The glazed-eye look a guy gets when he sees something sexually appealing. Caused by increased levels of testosterone, and highly common in teenagers.
Pam: I hate my job at Hooters. All the men do is just stare at me.
Kim: Duh, your boobs cause a man trance on them. What did you expect from working there?
Randy: Do we have to go to that bar again? When those gogo boys dance, you always end up in a man trance.
Bruce: They look even better when dancing to Lady Gaga.