As I've posted elsewhere on the board I'm a couple of months into swimming laps at our local gym and I've talked to my wife about me wearing speedos while swimming but she has used it more as a way to mock me than being supportive. Because of this, I have been discreet about wearing them, usually taking them off at the gym before heading home.
Anyway, today, I was going to go to the gym to swim, had on a blue 3" Tyr under shorts, and our toddler son fell asleep unexpectedly, so my wife suggested having sex instead of me going swimming (NOT a tough decision for me). I don't know what made me harder- the thought of stripping down to my speedo in front of her or the thought that I was about to get laid, but I had a HUGE boner pointing to the side as I pulled off my shorts.
"Since you haven't seen me in my speedos," I said, showing her and I apologized for the boner. She laughed and said something like, "I can't believe my husband wears a banana hammock..."
God, I was so aroused, though in my fantasies she would have been really turned on by my speedos. Anyway, we proceeded to have some passionate, fantastic sex, primarily driven by my excitement about the whole situation.