Tramp Stamp?

I play in a co-ed sand volleyball league and I have witnessed something strange on more than one occassion.  Sadly.

Several guys at the courts are quite buff and play shirtless.  The scenery is nice.  However, I have begun to notice several tramp stamps.  On the guys.  In case you don't know, a tramp stamp is a tattoo on the lower back just above the butt crack. 

I'm not a fan of tramp stamps on women but now they are showing up on guys.  I'm confused and disoriented by this new revelation.  So confused and disoriented that I'm at a loss for words.

I really just want to roll up a newspaper and hit them over the nose while yelling, "NO!  BAD!"