Embarrassed they know I'm having sex right now??

I have a friends with benefits.

He comes whenever I want.

The thing is that it was usually when my 3 apartment roomies were gone.

Why do I feel bashful for bringing a guy over for sex?

They do not care, in fact they are all very sexually accepting.

They are all watching a movie in the living room and I am so beyond horny.

They 100% respect my privacy and I have my own room obviously.

Should I disregard my feelings of being bashful for having sex?

I guess it is just weird to me when they know exactly when I'm having sex and are also in the living room.

I'm in medical school and 22, so I am safe and all. They are very mature as well.

Lol I'm probably just overthinking.