Is it okay for anyone to sleep naked when it is winter??like only wearing undis witout pjs and then you cover your body with a sheet only..is it really okay??...

It's really up to you. Your decision completely, I mean, you'll be the one who'll actually be doing it. I'm sure it's fine though.

Yes it's perfectly fine I do it!!! Hehe I see no harm it's ur own body I mean if u get cold that's u u know there's nothing wring with it :)

its not like I would get any money if i filed a law suite against ya soo I guess its ok :S

You can't get pneumonia from cold weather. You can't even get a COLD from cold weather. Those are wives' tales. It's only in warm places where lots of people are that you get pneumonia/colds.
And that's fine that she does that, as long as you tell her to have a warmer blanket she'll be fine.
So you actually have no cause to be worried.

I mean, it's okay, but I do think she should wear more clothing in winter. she'll probably get fever that way.
I think you're just being a good friend, and I do agree that it's worrying not to wear enough clothes to protect yourself in winter.

I love naked winter cloth haft warm sleep.

Dood, I live in New Mexico. It's perfectly acceptable to sleep naked any time of the year here.