Re: When you're about to have sex
I mean, it depends entirely on context. If you wake up in bed with your significant other, you're probably going to cuddle and grind a bit for a while before you get completely undressed. If you're home from a party and have been hornying up each other the entire evening, you might just take off everything on each other rapidly.
I guess some kind of middle-ground is common. Partial disclothing before getting into bed or on the sofa, some grinding and making out, touching, stimulating the nipples, that kind of stuff. When you're both sufficiently ready, the last underwear goes off.
Sometimes it's hot to keep a g-string on, or some kind of lacy-underwear thing. And yeah, if you're particularly horny, it can be pretty sexy to just get partially undressed, with both having your respective trousers on your knees. What people don't tell you about that, however, is that you get really warm and sweaty, which isn't generally that pleasant.
I remember getting with a girl and having her keep her skirt on, though. Stuff like that can be sexy.