I've slept nude ever since I was about 10 years of age. Don't possess any pj's but might sometimes resort to wearing a tee shirt in winter. Getting dressed to go to bed makes as much sense as wearing anything to go swimming.
Hell, I sleep nude all year round. It really is more healthy to do so, and if I have a Female partner, I will cuddle with her and eventually convince HER to cuddle with me naked. Yes, it might get in the way of sleep, but eventually you pass out in each other's arms.
I have slept in the nude since i was a little one. Even my kids do too now. My daughter had showed all of her friends when they had a slumber party. I remember waking up in the middle of the night all groggy to get water and decided to check on them. Next thing i know im seeing all 7 of their little bodies sleeping in the nude! so beautiful they are comfortable with it.
I sleep nude all year long. It is so much more comfortable not having to wrestling with your clothes under your covers. In the summer time it is cooler and believe it or not you stay warmer in the winter.
Sleeping nude for me is a year round thing. I can't stand fighting clothes when I toss and turn in bed. Being cooler in the summer is definitely a bonus though. As for the winter time I just set the thermostat at 69 F and I'm good.