Fact of the matter is, the average woman doesn't want to have sex with someone just to get their rocks off. Women generally have sex to deepen a connection with someone they want to be connected to.
There's a common theory that if a guy walks up to 10 women and says "hey, wanna ****?" he'll get slapped 9 times but it's worth it for the one who says 'oh yeah'. The 9 girls will have felt like a piece of meat as if they are nothing but a body.. Often not even that much, some guys have the ability to make women feel like just a hole and a pair of boobs. Surely you can understand why that would be offensive.
'People are never perfect but love can be. People waste time looking for the perfect lover rather than creating the perfect love' - Princess Leigh-Cheri from Still Life With Woodpecker.