This Question has come across many of your minds and relationships have been tested with this. Have to say that if it is mutual it may happen. Although some have doubts, which is okay. Not all partners can be trusted. Some are accused and some are trusted. Sex in the mix can confuse things and ruin friendships. Everyone is okay to be biased on this topic. In my past, I was not to have a guy friend as a friend because of jealous Exs that had no understanding and were insecure of themselves. What are your thoughts on this topic?