Who told you that the beach is the only place to get everyone to see that you are sexy. By the way being sexy means being physcally fit, so if you have a good body, may you be male or female, as long as you have the right curves and muscles, you may call yourselves sexy. Also, Sexy girls wear sexy lingerie. Even if no body can see them or only few could see them, they still wear lingeries. So if you want to look sexy on your sleep, better wear a sexy lingerie and be sexy inside your room.