Guys, Why do guys touch themselves when they see you?

Anonymous
Ok so I've noticed after I've had sex with a guy when he sees me out in public or just me stopping by or hanging out in general no matter where we are when I walk up he starts grabbing himself while staring at me and I'm like wth why are you doing that. Men only please explain what this means? Are these guys just overly sexual or assholes it makes me uncomfortable.
Guys, Why do guys touch themselves when they see you?
6 Opinion