by wet_pants
It's natural to want to combine the two functions of a penis and the two functions of an anus. Drawing limits between sexual and excretory functions is unnatural. By joining the two activities together in time, the sexual part becomes intensified, and the turn-on becomes certain. I like to begin the action by inserting a suppository laxative into my fuckbud's rectum, and then fuck him as it begins to work and the soft stuff descends. Best lubricant there is! Try it.