What I wear to bed largely depends on a number of factors: Temperature, horniness and mood. Typically it's going to be boxers, in colder weather it may be supplemented or replaced by pyjama/lounge pants. In warmer weather, the boxers may be replaced in favour of my birthday suit. Also depending on temperature, I may or may not wear some sort of top to bed. The general rule in that regard is about 10:1 for not wearing anything above the waist. Blah, but then sometimes I just like to sleep naked regardless of the temperature.