Your question may not have been clear, Lilli. And, neither was my reply!
Yes, I get a bit turned on sleeping in a tite sports bra, forms, and tite girdle. I usually go to bed tucked, too. No, that is NOT a comfortable outfit. Which is exactly why it distracts me from my often overwhelming bed time thots of all the things I need to do and my planning for the future instead of sleeping! Instead, I'm constantly reminded of how I'm dressed. My thots drift into sexy scenarios and I soon fall off.
Kind of the opposite of what other fetish nite dressers have said here!
If I want comfort at nite, nothing beats a simple pair of tidies, period!