“But she’s a good student,” the teacher said. “She communicates with me via e-mail.”

“You need to fail her,” I said. “But I’ll make a deal with you. If you give her an F and she appeals the grade and makes up the missing assignments, I’ll allow you to raise it to a D. But only if she appeals the grade and makes up the work.”

The teacher took my advice and gave the absentee student an F.

As I expected, we never heard from the student. Ever. So the F stood. And we all learned something: The teacher wanted the student to succeed more than the student did.

People send each other messages all the time through their behavior, and the message here was, Fail me. I don’t want to be in school anymore. Instead of admitting that she wanted to get out of fashion, she forced the faculty to make her decision for her. From a faculty member’s point of view, I have this refrain: Why should I want you to succeed more than you do?

PEOPLE WHO ARE USED to having everything done for them don’t often have a strong grasp on how the real world functions. Sometimes it’s infuriating. Other times it’s kind of adorable.

Case in point: One night in 2007 I was at Gen Art’s Fresh Faces in Fashion event. Gen Art is an incredibly valuable organization that supports the work of rising artists and designers. In addition to running myriad events and competitions all over the nation, Gen Art features the work of selected rising fashion designers at an annual event in New York. I was asked to judge the Best in Show, along with Diane von Fürstenberg and others.

Diane and I were there early, though she thought that she was late (“Even when I’m late, I’m early,” she declared). To kill time, we toured the displays in the lobby of the Hammerstein Ballroom (a relic from a bygone era of New York nightlife), which featured the work of rising accessories designers. Cocktails were in abundance. While I declined, Diane gave me reason to believe that she had not.

“I need a hot dog,” she announced to me in her languid voice.

I wondered for a moment if that was a euphemism. Don’t look at me,I thought.

But no, she was speaking literally.

“Why is there no food at these things?” Diane asked me. “They fill you with booze but give you nothing to eat. Do you think there’s a hot-dog vendor on the street? Oh, and I haven’t any money.”

This struck me as a little odd. Remember, this is PrincessDiane von Fürstenberg, now divorced from the prince and married to a member of American royalty, the billionaire Barry Diller. She had a car and driver sitting out front. Surely there were a few dollars in there for tolls and such? But no.

“Don’t worry,” I assured her. “I can treat us each to a hot dog. Let’s see what we can find outside.”

We exited the dusty old ballroom. Diane lunged forward to inform the driver of her shining, bottle-green Bentley that we were going off on a hot-dog mission. I looked around and saw nothing that remotely looked like a vendor’s cart. However, I knew that there was a diner at the corner of Thirty-Fourth Street and Eighth Avenue, a nice little dive called the Tick Tock.

We sashayed down the sidewalk, Diane’s arm wrapped around mine. I held the diner door for Diane to enter, and she burst in as if she expected silver trays filled with every kind of hot dog and condiment to greet her. Something told me that she had never been in a place like this before. Sure enough, she didn’t seem to know how diners worked.

While I tried to catch the eye of a waitperson so we could sit down, the famished Diane grew impatient. After sighing heavily, she called out to the rather cavernous space, “I need a hot dog! Someone, anyone, please bring me a hot dog!”

Well, this captured everyone’s attention. Every waitperson and every diner was suddenly staring at us. Imagine how we must have appeared: me in my Tim Gunn outfit and the ever-recognizable Diane von Fürstenberg (no wallflower, she) in all of her stunning regalia.

An amused waitress approached and led us to a booth just to the right of the entrance while Diane kept repeating, “I don’t need to sit. I just need a hot dog.”

“Well, let’s sit for a minute,” I cajoled, winking at the waitress. “Maybe you’d like some french fries as well.”

“Oh, yes, that would be nice,” she said, and smiled with a look that suggested she could smell them, “and some onion rings, too!”

Onion rings? Maybe she had been in a place like this before.

“Oh, and some pickles!” she called after the waitress.

Pickles? I began to suspect DvF was a diner junkie.

Diane’s energy was low, I could tell. She has a languorous look that I find extremely sexy, but in this case it looked more like a low blood sugar haze. I asked the waitress if she could bring whatever food was ready first as soon as possible. She obliged by bringing the pickles right away. Diane began to perk up as soon as she took a bite.

We talked and laughed and when the hot dogs, french fries, and onion rings arrived (quite speedily!), Diane had two bites of the hot dog, a couple of French fries, and then didn’t even touch the onion rings.

When we got up to leave, the people in the next booth leaped to their feet and asked whether they could take a picture with us. I’m always game and was about to oblige, but Diane stepped in and held her hand up.

“I’m sorry, darlings,” she purred, “but we’re late for an event where we’re both needed very badly. We don’t have time for a picture, but here, have some onion rings!” And she handed her stunned fan the basket.

I’m not sure what the moral is here … I really just wanted to tell that story. But maybe it’s that declaring to a room full of strangers, “I need a hot dog!” won’t get you what you want no matter who you are, unless you follow protocol and sit down and order like a regular person.

Also: If you’re going to yell demands for food into a room full of strangers, you’d better be as fabulous as Diane von Fürstenberg if you expect to get away with it.

I SEE DETACHMENT FROM reality all the time on Project Runway.It’s often about three weeks in that the designers become daffy with exhaustion. We shoot each season in thirty or thirty-one days, and something weird always happens on Day 24, every single season. It’s the point of the cycle at which everyone gets annoyed with one another: designers, judges, crew, and producers. Everyone starts complaining about how they need more sleep. Fights break out. Also, everyone gets into magical thinking.

On Day 24 of Season 3, for example, Angela Keslar very somberly approached to ask me a question that was plaguing her. There was a lot of buildup to that meeting. The producers told me that Angela had come to them with questions, to which they responded, “You have to hold your questions for Tim and ask him on camera.”

Well, we went to Mood, and I’m reminding the designers of how much time they have, and she says, “Tim, I have a question. We’re all really tired and really stressed out. And I’m sure you’ll say no, but can we have an extra fifteen minutes?”

“You just answered your own question,” I said. “What do you think?”

“No?”

“No,” I said.

OUT-OF-TOUCH BEHAVIOR IS certainly nothing new to the fashion world. I have an infinite number of less-than-endearing stories where it morphs into outrageous divadom. I’ll share a couple of my favorites with you. Both are about people who work at that bastion of the industry, Vogue.

In the summer of 2006, a writer named Robert Rorke called to interview me for a New York Poststory about Project Runway.He asked me, “Of all the things you’ve seen since you’ve been in the fashion industry, what’s the one thing you will never forget?”

And I said, without hesitation, “That’s easy. Anna Wintour being carried down five flights of stairs from a fashion show.” He said, not surprisingly, “Tell me more,” and I told him what happened. He ran only one line about it, but I’ll tell you the extended version, including the ridiculous epilogue.