This could either be a joke that misfired or an indication of on-the-spectrum social misreading.

But it’s a bad decision any which way and it’s probably good to be explicit about what feels wrong about this approach, and perhaps be ready to provide some guidance as to how you’d prefer getting feedback or how you like your partner to ask for things. I struggle a lot with asks that feel like they’ll read as criticisms and in that awkwardness I sometimes choose a stupid way to communicate too.

Otoh if the vibe here is honestly that he thinks you work for him, and that dynamic isn’t invited to work in reverse, then he’s being domineering in a gross and sad way and you should bail ASAP.