Does sleeping in the nude lead one to adopt a sexually permissive attitude?
Not necessarily, at least in my experience. At first, it feels both odd and a little exciting, but after settling in and trying to sleep, it’s incredibly relaxing overall. No clothes to restrict your movements in the night, and you glide across the sheets effortlessly.
There is the fact that your “naughty bits” are exposed in the open air, and yeah, that can be a bit arousing. But hey, getting off usually helps me sleep even better, so it’s definitely not a downside.
In general, though, no, I don’t think it affects one’s daily sexual attitude whatsoever, not in any noticeable/drastic way, anyway. At least not in my experience.