We had a few if them growing up. We'd go to friends' summer houses and all sleep in sleeping bags (1 person per bag) and stay up all night talking. There weren't any couples in my group of friends and no one ever did anything but talk and laugh. Occasionally a parent would remind us that it was late.
Now in my 40's I don't have a problem with that kind of bonding and if DS asked to do something similar it would be okay. Not everything is about sex. You know your kid. Trust or don't but when they go to college you aren't going to have a camera, a parent, and a microphone telling them what to do and not do in the dorm room.