Is it normal that my girlfriend can’t understand why i love to smell her pussy?

Can you really quick make up a scratch and sniff post cards and pass them around so we know what you are referring to.?

Maybe she is reluctant because she is nervous that you won't enjoy it or find the smell off putting somehow?
So put yourself in her shoes, imagine that she goes down on you and finds that your dick stinks of pee, stake cum, sweat or whatever.. And she says yukk you are disgusting ( which would be true if you have a smelly dick lol)

If you did that to her then she ain't ever letting you down there again

You don't have a girlfriend.

Yes, it's normal for her to not understand it. Yes, it's normal for you to enjoy it - as long as it doesn't smell like fish!

I wish my partner enjoyed my vagina that much.

Exactly. Not to mention that it puts me over the moon for the rest of the night.