Have often shared pic's of the wife with close pals - swapped pic's between us too. Last summer we went on hol with another couple - hired a villa in Spain - the girls went topless from the off, but within a couple of days all four of us were spending all of our time naked - in the Villa, around the pool etc - sexy as hell...and because we were fairly private as opposed to being on a nude beach, us two guys could wander around with hard-ons as much as we liked!
