I almost always use some sort of lube. My first choice is "ID Silicone" very similar to astroglide. But ive used everything from the shower to the kitchen and possibly the garage. If it feels good use it!!

I have been shaving my cock, balls, and anus for years... I simply love the smooth feeling when I masturbate and have sex with my wife. Fortunately my wife is completely waxed which adds to the feeling. I have gone totally bare several times however my wife says she likes a little patch above my coc...