The reason that popped up in my head (social media probably) is that people are afraid of what will happen (loose a good friend) if they break up. I suppose some may see it as safer to meet someone outside your "social foundation" so you can always have people to fall back onto. I *think* people can have issues staying friends if they end out breaking up and if they were both in the same group of friends then /hmm... I don't know if this is the actual reason.
I've never understood why a lot of people seem to think getting intimate with your friends is a bad idea... ...If you're not attracted to me, that's fine, but don't say "I don't date friends" because that just sounds idiotic. You can't be friends with your long term partner? Then WTF is the attraction?
I currently like a friend of mine but i don't wanna lose her. I've never met anyone in my life who I could share a lot of things with. I'd rather stay friends with her than going out, breakup and never talk or see her again.
I've been intimate with some of my friends (like best friends with benefits) and I haven't seen them in ages. I never had a problem with it but there has been problems arising from it.