Are you gay if you look at penis sizes?

Not if you're just looking. Lots of men check out other guys, although in the U.S. we're sort of awkward about it. But if doing it turns you on, you're either gay or bisexual.

Young males growing up routinely check out penises from other males. It's completely normal and is part of maturation to compare or admire. Adult, heterosexual porn involves looking at the male penis again...kinda hard to ignore; so with heteros there must be some sort of turn on there as well. I remember being taken to a private viewing (in a hetero home) of Johh Holmes getting head. All the hetero men in the room were commenting on his penis and cheering for a climax. Only one gay there-me.;-)