How do I approach to my son about his sexually behave?

My family is having a reunion this summer. However my 23 years old son has reserved a spot for two person. So we know he's planning on bring one of his punk girlfriend.





Last year when we went to meet them up at the lake, we came bit early and he was kinda freaked out because his body have few deep bites and scratches marks on it.





My parents recently told me this winter when he came down here for holiday, they can hear him and his other punk girl friend in the bedroom. The girl was talking about how she love a lean fit athlete guy since their blood taste better. Also my parents say they make lot of noise when he's in control.





This is very embarassing for all of us. We have always liked the girls he brought with him. They're unique but very sweet and intelligent. So we don't want to scared him away. But at same time we don't like to see him all cutted up or hear them having sex. It get really scary.





Also do anyone know why would a guy who look and dress like a high fashion model

How do I approach to my son about his sexually behave?
You can ask him not to be so loud in the bedroom with others around but I don't think you should interfere in his life to the extend of 'making him lose interest' in her. Many people who have some alternative interests are very intelligent too; apart from her looks, what's her behaviour like? I've known several punks who studied hard, were into reading, etc, etc. Don't judge a person on their looks and what they do in the bedroom, that's up to them!
Reply:I doubt anything you say to a 23 year old man is going to make much difference in his sex life. You might be open and candid and say something like," hey the walls here are thin, so keep your sex-capades to a dull roar, the relatives are talking about you". What else could you say or do?
Reply:As I agree that there is nothing you could do or say to make him lose interest in such a girl, you could tell him that you dont want to hear him having sex. If hes insistant that he is an adult, tell him to get a hotel room instead. He needs to have some respect.