Yea, as conservative as it sounds - I'd have to go with (A) as well.
I mean, for one - Jerking off to a guest in your house is lame, and perverted - Simply because I couldn't imagine being caught, by either the female waking up (while tossing/turning over). Or the boyfriend coming out of the shower randomly. Talk about awkward. Not only would you be an ex-friend, but you'd also be classified as a peeping tom, once they spread word to your circle of friends. Not worth it
