Exactly. These are all opinions, and one opinion is no more "correct" than the other. My opinion is anything goes, with the caveat that both parties know what they are getting into. Assuming Kaitlyn had sex with Shawn, if she told him it was a casual thing and Shawn didn't like that but did it anyway, his bad...if she led him to believe she did it with him because he was "the one", her bad.