Back when I was single, I said no several times to several female friends, for an assortment of reasons. None of these reasons seem particularly sound to me now.
I think a little bit of sexual tension is kinda cool. We may be monogamous, but we’re still alive!
When duty calls.
I’m not great in the sack, I’d owe them a lot. If I liked them, I’d spare them the tedium and embarrassment 
Me too - I rather think it adds spice to life.
I voted yes, but my female friends tend to fall into two categories: very, very attractive; and not attractive at all. Generally the first group are chicks I tried to pick up, who became friends. Generally the latter group are chicks I just became friends with naturally. I’d probably have a tough time becoming friends with a girl I found attractive without trying to hook up with her first.
Now that I’m engaged, I don’t really meet any new people anyway so it’s not a problem.
Well, you’re not exactly average, dear.