It's possible but rare. I had a female friend who was a tall blonde, my type but we were just friends. We went out drinking together, she hooked up with guys and I hooked with girls. We were pals. We both valued our relationship which was unique! No one who knew us believed we never had sex. And honestly there were a couple of nites you could tell we were both thinking about crossing that line, but we never did. We did a lot drugs and alcohol and we were just friends. That lasted for about a year and then we stopped hanging out so I have no idea how long that could have gone one. Till this day no one believes we never had sex! But we didn't.