The only person I always use a condom with is my husband (since November 2012).  With Lovers, I encourage them to go without, but if they insist its ok......but no where near as exciting for me.  I have, ever since I started having affairs, hoped that I would "accidentally" get pregnant by a Lover.  Some I even tried to get pregnant with.  I use a diaphragm for birth control, but I am easily talked out of using it. 
J (the wife)