Grizou
Don Juan
If you are that much into gettin' a threesome and could ignore the fact that some other dude is bonin' the chick at the same time, do how you please. but I'd say "quid pro quo", she should join you in a threesome with another girl afterwards!
personally, I would not do it just because it would turn me off to have another meatstick around.
personally, I would not do it just because it would turn me off to have another meatstick around.