Crotch-gazing is very common. Men, both gay and straight, do it. It’s harmless; sort of checking out the competition. Women do it, some trying unsuccessfully to be subtle do it.
Remember a few years ago the commercial for Haines underwear for men? Two very attractive women are sitting in a park having paper bag lunches asking each other of passing men. “Boxers, you think? Or Jockies?”
The message from Haines was clearly: “If you’ve got it, show it. They’re looking.”