For example: You can have a "sweet" guy sweep a girl off her feet, make her feel loved an appreciated, ending with a night of sex that she fully and enthusiastically agrees to, only for her to discover later that the guy only had sex with her on a dare or as a joke so he could brag about it to his pals, or for some other low-life reason. Does she feel violated? Holy heck yes. Was it rape? Er... that's not so clear.
To bring up a fictional example, that reminds me of the movie "40 First Dates." The premise of that movie is that Drew Barrymore's character has a form of amnesia that causes her to forget everything she's experienced the next day. Now, Adam Sandler's character has thus far been in the habit of having sex with women and dropping them afterwards. Obviously, Drew Barrymore's character would be the perfect "target" for this - he could have sex with her, and the next day she wouldn't remember him, so there would be no need to even dump her - he could just act as if he didn't know her and she wouldn't be the wiser.
Of course, this being a happy movie, he doesn't do so, and they eventually marry - but the question is, if he hadn't resisted the temptation and done the "sex her and and leave her" thing, would it have been rape? On one hand, she would have consented to the sex, but on the other hand, she wouldn't have knowingly consented to being sexed and dropped.
Also via metafandom
To bring up a fictional example, that reminds me of the movie "40 First Dates." The premise of that movie is that Drew Barrymore's character has a form of amnesia that causes her to forget everything she's experienced the next day. Now, Adam Sandler's character has thus far been in the habit of having sex with women and dropping them afterwards. Obviously, Drew Barrymore's character would be the perfect "target" for this - he could have sex with her, and the next day she wouldn't remember him, so there would be no need to even dump her - he could just act as if he didn't know her and she wouldn't be the wiser.
Of course, this being a happy movie, he doesn't do so, and they eventually marry - but the question is, if he hadn't resisted the temptation and done the "sex her and and leave her" thing, would it have been rape? On one hand, she would have consented to the sex, but on the other hand, she wouldn't have knowingly consented to being sexed and dropped.