Is it normal to want to have sex with a sleepy girlfriend

you want to have sex with her while she is unconscious? that's sounds a little different., but if she's okay with it then who cares.

sorta semi related, there's a movie coming out soon called Sleeping Beauty about a prostitute who allows clients to drug her and have sex with her while she's asleep.

Yes it's totally normal. My bf does it all the time and it's fun to hear about it later :)

It is a fairly common fetish. Unless you think she'll freak out, ask her sometime if you can try it on with her while she's asleep. Have fun! ;)

Do it bro

because she is in a more vulnerable state maybe?