Nothing brings friends to your house like a Wii, and there's something to be said for actually doing things while you're playing a video game. AND you get to talk about your Wii all the time without cracking a smile.
My friends all like my Wii. My neighbours ask to play with my Wii. My boyfriend is addicted to my Wii. Hell, even my mom likes playing with my Wii. (Okay, that last one was too much.)
Oh, and while your friends have the controllers in their hands you can be like "Those things are, like, half the size of my cock" and see what happens.