A girl in the club told me she had a boyfriend and I took it as a shit-test and tried to escalate. She rejected my kiss.

If a girl genuinely has a boyfriend, how is this a shit-test? Obvious scenario would be if she told that to Brad Pitt and he tried to kiss her, she'd reciprocate, but this is too extreme an example.

Do we really assume this is a shit-test as the norm?