Stinky semen

I cum in my pants a lot when I masturbate.  Can other people smell it?  I can't tell if they can pick up the scent or not.  Even with fresh underwear.

A few dabs of cologne is enough to make an impression. Globs of that junk in your pants will be overwhelming. Kinda like bad breathe if you can smell, it's bad.

Now here's a question for the less... extreme. Does sweat from masturbating smell different from the sweat from exercising?