Why does the guy I’m talking to not seem to care if I get pregnant?

We’ve only slept together once and I don’t know him that well but he says that I’m so fine that he’s ok with knocking me up even though he doesn’t want a kid. Is he being serious? We’re both in our late 20s so it’s not like we’re that young but still
Why does the guy I’m talking to not seem to care if I get pregnant?
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