No, I have never been able to sleep naked, tried a few times and it just feels weird to me. In fact I always wear a t-shirt and either boxers or a pair of shorts to bed. My boyfriend makes fun of me because five minutes after "sexy time" I'm glancing longingly at my clothes lying on the floor and he rolls his eyes and says, "Yes, go ahead and put on your ten layers of clothing weirdo!". Of course, I think he's just as weird because he usually wears socks too bed, that is the one article of clothing I can't wear to bed, it just feels weird wearing socks, almost as weird as being naked.