Spanking humor

Lame, I know, but what can I say?  The few occasions I remember seeing grown men spanked in the media it's usually been in a cartoon or something.  Considering how common butt-whipping of men has been historically, of convicts, slaves, students, servants, initiates, soldiers, sailors, and so on, it's amazing how seldom it's shown in movies and books.  Maybe it makes people nervous.

If it weren't for all the straight guys spanking each other on Youtube, you'd think the practice had died out.  That, I'm certain, will never happen.  It's an instinct.