Can Friends Have Sex & Remain Friends?

Some people suggest that men and women cannot be friends due to their natural desire to want INTIMACY. Although there are plenty of PLATONIC RELATIONSHIPS between men and women that do not include intimacy, but the question is what happens if they add SEX?  Will the friendship remain intact? What happens if one of them catches feelings?  What if the SEX is great/terrible?  If they successfully have sex without any attachments, will their friendship be a threat to any of their future relationships?  Special guest, YONCI YOURHOSTESS drops buy in the last hour to #GIVEUSHER3CENTS as well. MENTAL DIALOGUE asking the questions America's afraid to ask. ALL I ASK IS THAT YOU THINK