Multiple reasons. sometimes I just can't sleep, cause I am horny as hell, an I know I'll feel better after. Plus a nip on the bottle can't hurt either. But the best is planned masturbation. When I get the house to myself, I put porn on every TV, and stay naked for as long as I have the place to myself. ( my significant other really only give me sex 4 times a year, so thats probably the reason I need to over indulge with the porn.) I enjoy playing with myself so that I stay hard for a couple hours at a time. I almost hate to cum as I ham having too much fun. If I thought anyone would enjoy watching me, I'd put a cam on, or have them over. If I could find any friends (mixed company)that enjoyed the same, or playing crazy sex games (flaunt it, or strip anything, etc) I'd have them over for a day or evening of physical pleasure.
for pleasure, to ease horniness, to help me sleep, because it's there between my legs and nice to play with (someone else's too), because I'm aroused, etc. etc. Simon
Since you asked the question and then pontificated in a long diatribe, I guess you do it to ask the question and then give us all your opinion. My real answer, Pineman, is that if you have to ask, you obviously don't understand human sexuality - something I've long suspected of you..........