Locking a poo behind you
Hey, sometimes shit happens. But if you exercise at a facility with individual unisex bathrooms instead of men’s and women’s locker rooms, do everyone a favor and leave the door open when you finish your business. Shutting the door prevents your stink from dissipating, and it’s the worst kind of surprise for the next person who opens that door.
Actually, do this even if the bathrooms are separate.
Being the "Ab Guy"
There was this guy back in college who always checked himself out in the gym mirrors by “wiping his sweat” with his shirt so he could lift up his tee and look at his own abs. If he thought he was being sneaky, he wasn’t.
Fifteen years later, Ab Guy is still a running joke in my household, and in every gym, there’s at least one Ab Guy or Gal making love to themselves in the mirrors. Get it together, people. You may be beautiful on the outside, but you’re giving me serious doubts about your insides if you’re that obsessed with your own physique.