In my opinion it depends on what you’re thinking when you admire the cock. If you are just like “wow, impressive cock” then that just admirin, much like you would anyone with a nice body or muscular. If you’re thinking “wow! I want to go down on that”, then you may be on the gay side of it.. My hubby is very straight and we have seen men at nude beaches of other nude activities where he was like “wow, that guy was hung! He didn’t want the cock, he was just commenting on how big it was.