I'm a gym perv
Why are you creeping on people at the gym?
I'm a big fan of sexy bodies and muscles
It's bad to act like a pervert and to violate people's privacy when they are trying to work out.  And, of course, it's worse to sexually harass people in any circumstances.  If you like looking at bodies, do so on the internet, not in public.
Who cares, who talks to random people on the internet or real life.
You're talking to a random person right now. You should care since if someone sees what you're doing you're going to get kicked out of the gym and possibly banned from others in the area. How would you feel if you were trying to improve yourself and some pervert was violating you publicly?