I don't think I'm really down with it, but wanted to know what everyone else thought.
I'd be ok with fuck-buddies, but is that easy to have with someone you've known and been friends with for a long time? Does jealousy get in the way? Can you do that for awhile and then just decide that you're not into that and stay friends? What about with people that you're friends with, but it's a meaningless friendship? Is that one easier to pull off?
What about (committed) relationships with friends? If you're best friends with someone and he wants to have a 'relationship' but you're not super into it, is it a good idea?