I sleep naked 99% of the time and have done since I was around 12 yo. The only times I don't sleep naked are when I'm sleeping in the same bed with someone I'm not romantically involved with (like a family member or buddy) or when I'm involved in some kind of gear or chastity play.... yeah I can be pretty kinky like that sometimes. I find it nearly impossible to sleep if I'm not naked. As far as getting hard goes, I can't really tell a difference. I almost always go to bed and wake up with some degree of wood.
I have slept in the nude since I was 12 because my erections were too big for the brief underwear I had. When I got older I tried different underwear but all of them could not contain my erections comfortably. I did find some underwear for well endowed men and they worked much better. I think I do get more erections when I'm nude but never counted.
living alone and sleeping nude just naturally go together. It's so awesome walking around and feeing your cock bounce off your legs. I usually have a boner as I go to sleep and as I wake up. By balls are always hanging low too, so it's more comfortable that way
i too sleep nude and do alot around the house nude. its cause when i started to get to big to fit comfortably in conventional underwear it just seemed natural u know. cause the underwear would be tight and really bother me especially during erections. its just so much mor comfortable in the nude.