Flibbertigibbet

A Question for the Hetero Fellas

Let's say that you are a trim but well-muscled young man in your late 20's to early 30's living in New York and your roommate is a big, buff, worked out guy. Would you walk around in white low-rise, briefs?

I'm just asking because the guys across the street are super hot and until I saw that I thought they were straight.

Cuz I think if you're that hot and you're straight, you probably aren't going to just parade around in your skimpy undies unless you're drunk and/or there is a female involved. But I'm also not familiar with the boundaries of heterosexual male interactions.

Thoughts?

Also, if these guys are gay, why can't they make out in the kitchen now and then where I can see them?