I know there is no right or wrong answer to this, but I'd love to hear your thoughts.
Would you sleep over a (completely platonic) friend of the opposite sex's house without your FI? Would you be comfortable with him doing the same?
I'm going to Philadelphia Sunday to see some friends. Most of my childhood friends are male, and the only two that are female live in the suburbs. If my female friend hadn't taken off work Monday and offered me a room for the night I would have gone back to NY Sunday evening rather than staying with one of my male friends who lives in the city. FI hasn't actually said anything about it forbidding me to stay overnight with a guy friend, but I know he would be uncomfortable and therefore I feel it would be disrespectful to him to do it. He was in London a few years ago on tour and chose to stay in a hotel rather than the (female) friend's house that the rest of the group was staying at. I wouldn't have been threatened by his sleeping at this woman's house, but again I found his action a reflection of his respect for our relationship.