Have you ever been stuck in a situation where you just COULD. NOT. LOOK. AWAY. ? You knew it was a major faux-pas, you were probably hurting someone's feelings...but the more you berated yourself mentally, the funnier it got, and the more 'stuck' you became?
Hoo boy, do I know that feeling.
My previous job had a large Asian population. (Great for handmade spring rolls!) Many nationalities were there, but the Vietnamese were predominant.

Many of the Vietnamese men at my job had one strange quirk. They had extra long pinkie fingernails on their left hands. Very hard to NOT notice, but since it's a personal grooming issue...nobody wanted to inquire about it.
Except one Friday, one of my technicians finally asked the other about the nail. He replied that it was cultural (duh), and that most men used it to 'wipe' their butt. Said it was better than toilet paper - no residue. Ewww.
The next day, I had a pedicure schedule with my friend, "Barbie". As we waited, we chatted about the work day...and I told the fingernail story. We were shown back to our little massaging chairs, and relaxed.
Until the pedicurist arrived. A guy. A Vietnamese guy.
He (thankfully) donned rubber gloves before touching us...but all we could do was stare at his hand in horror. I glanced at Barbie, and saw the same "oh god, what do we do" look on her face that I could feel on my own.
My eyes were drawn inexorably back to The Fingernail. It seemed to waggle obscenely at me, clad in rubber and standing off from the rest of the hand.
Barbie got the same impression, for as we once again matched gazes...we burst into giggles.
For the full 30 minutes it took to get our (admittedly great) pedicures, this same situation kept happening. We couldn't talk, we couldn't read our trashy magazines...all we could do was stare at this fingernail, and hope our guy never looked up.
[I know you're wondering - and NO, that's not really what it's for. My tech was having a little joke on the person who asked...lucky me, just caught in the cross-fire. Sicko]