23. What do you think of best friends of the opposite sex?
If it works, why not. I've had lots of male friends, probably more than female friends in my life, but never what I would call a best friend. My daughter's best friend is a guy but he's a gay guy. They've been best friends since they were kids.
Probably better if you're friends with a guy to whom you're not sexually attracted, but that often has a way of popping up when you least expect it :)