SO and I have been together for a few years. As teenagers in high school, we had sex in her house all the time. She knew. We knew she knew. She knew we knew she knew ;] Anywho, haha, I don't think it was such a bad thing looking back (and now was a parent). We didnt go and have sex in stupid places. Granted, I will NEVER let my DD have sex in our house, I don't think there was anything necessarily wrong with her letting us.