i had never thought about it before, but i'd have to say no. i've only been with two guys and i had one lesbian experience in my salad days, but i am more than content with big, and the sex is varied enough, and great enough, that i don't feel the need for more partners, just more experiences. even if it involved other people, i'd always want him there.
besides, i can always live vicariously through lil. (provided she shares)