Would a man reject a sex with a girl because she’s a virgin?

A married man wanted to have an affair with a girl for a long time. After she told she was a virgin, he decided it’s a bad idea for her.
What’s the reason for men here-a guilt, that he won’t be able to give her serious relationship and doesn’t want to use her for a hookup? Please explain me the “responsibility” thing men talk about
Would a man reject a sex with a girl because she’s a virgin?
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