I find sleeping people to be very sexy. I'm sure those sleep pornos all around the internet aren't all made JUST for me
I voted Anything I want, but really I don't think I'd do anything just because there's a letter saying I could. I'd rather talk about it beforehand and it'd have to be without any kind of illegal drugs or mixture of drugs/alcohol.
I find no reason to try to explain a fetish.. It just is what it is.