Let me paint you a picture.
Freshman girl gets invited to a party by a couple of her upperclassmen friends. They go. It's maybe her first or second time ever consuming alcohol. Beer in the keg, liquor in the fridge. Her friends hand her a drink. She gets buzzed. She meets a guy. He's funny, charming, etc, especially now that she has beer goggles on. She's having a blast! She decides to ditch the beer, it tastes awful. She goes for vodka. With some juice. Much better! By the time she is done with her second drink, she's drunk, and doesn't even taste the alcohol anymore. Her new guy friend offers to get her another so she doesn't have to get up. How sweet! Why yes, thank you.
The next morning, she wakes up in a strange room, on a strange bed, and she's naked. Oh my god, what did I do last night? Vaguely, she recalls the party winding down, getting lame. Her guy friend offered to walk her back home, but there was another party getting started across campus he was going to. Sounded fun, she went. No memory, then she remembers his hand rubbing her leg while on the couch. So she grabed it, and held her hand. Then she remembers making out with him. He puts his hand on her chest...then down. She pushes back a little, mumbles a drunken slur of a NO....
But there she is, naked in a bed.
I have seen many a girl leave a house the morning after with shame all over her face. Happened to a friend of mine, too, exactly as I told it. This happens every single weekend on campuses all over the US.