Anything by the Asylum Street Spankers. Most recently, "The Birthday Spanking Song" (to the tune of the William Tell Overture) and "Closer", which has a filthy enough subtitle that I will not repeat it here.

I recently got to see them when they came through Boulder (Colorado, USA). Great fun!

They have apparently (???) gone away from their strict acoustic militancy. In a small room, they miked up. I had never been in this place before; must have had really horrible acoustics.

BB,
NightWing