I wish I had an ass 😭

My bf and I are always down for experimenting and lately I’ve really been wanting to twerk/dance on his lap (not like a full-on routine with glitter and shit, y’all get what I’m saying right?). Unfortunately, I’m lanky and flat as a pancake and therefore super self-conscious about doing anything that’s usually associated with curvy women who actually have some hand-eye coordination. He loves anything I do for him and I know he’d never say anything about it, but how do I tackle this without looking (and feeling) stupid?

I’m actually trying to gain weight but obviously that’s more of a long-term solution to my confidence issues. Is there anything I can do in the meantime?