rizz up

"rizzing," especially when consensual like here, is typically a vehicle for telling a good joke, something that is widely considered attractive. It's a test for how much you're gonna like each other, as compatible humor indicates compatible morals and values.

If you don't agree that the person should even try endure themselves to you, of course it's gonna come off as creepy. They need to ensure you're ok with it, or they never stood a chance do begin with.