I stopped befriending females 4 years ago, but not because of the thread premise.
The fact of the matter is, a lot of people befriend others who share common interests or fill a certain role/void. I have had female friends before, and im talking we spoke about anything, I could touch ass/t*ts at a whim and they could touch the jimmy

and at most it would result in play wrestling. Now what people have fukked up is not thinking these relationships cant exist, or the women who think they have 100% friendly men...there is a thin line. If im 100% not attracted to a woman and she is my "friend", chances are it was because I befriended her in spite of some grimy shyt she does, and her good outweighs the bad. But lets be real...what happens, male or female, when one of your friends also happens to be bad as hell? There is always that room for a slip up, a lowering of the guard so to speak, that turns friends into bedfellows.

"I don't wanna ruin the friendship." If fukked and maintained decent friendships. It's possible when you have two cool people who are horny but don't have other immediate options. Male and female, all it takes is one moment of weakness. One "Damn, she looking in this moonlight" or "Cotdamn, the way he was swinging that axe at that cherry tree shirtless" to put that seed in your head. Then it is a matter of when both of you are ready to fukk SOMEONE, but you would rather it be with someone you trust dearly. Real platonic friendships do exist, but it usually requires
A. You already fukked and thats as far as it logically goes
or
B. You both aren't attracted to each other for some extraordinary circumstance.
Truth is, though, that every day, something random, something mundane can turn your homegirl/homeboy into your future pin-cushion/kabob of choice.