Why would a guy tell his friend who’s a girl say she’s a weirdo and he jokes about having sex and giving her head? He said she’s so pretty as a joke?

Why would he even joke like this if he claims he doesn’t have a crush on her. He’ll get quiet when she mentioned a guy she likes then he’ll say he doesn’t give a fuck.

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9 mo
He said he never like a girl who’s a weirdo like her
Why would a guy tell his friend who’s a girl say she’s a weirdo and he jokes about having sex and giving her head? He said she’s so pretty as a joke?
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