Is it okay to sleep without underwear?

Yesterday night around 11 PM, I was up late watching random youtube videos. I came across one video about “Tips All Girls Should Know” and I was curious as to how far my knowledge went about being a girl. There were a few I already knew such as always pee after sex, don’t use scented soaps and lotions, the usual stuff i’ve always known. One tip that stood out the most than others was: Try sleeping without underwear on. I’ve never heard this one before, however I do vaguely remember my mom always telling to wear underwear while in bed. In the video the girl explained that wearing cotton material underwear will help your vagina breathe and stay smelling fresh and clean, and to not use certain materials that could cause a strange smell down there. She explained i’m vague detail that not wearing underwear to bed is actually good for your vagina considering it’s been behind cloth all day long and that this gives your vagina a better scent and it’s healthy. She said this is not only a way to “boost your self confidence” but to keep your vagina more healthier. What I want to know is: Is it safe or shall i say “healthy” to go to bed without underwear?