Come on ladies

So for a while now I've been talking to a girl I know and.... She still won't attach a helium balloon to her hair! All I'm asking is for her to put her hair in a ponytail, get a helium balloon, tie the balloon to said ponytail, and see how high it floats. I've even offered to pay for the balloon and everything. She still hasn't agreed but I'll keep plucking away at her. I'll get her to do it eventually Is it really that bad? I've had my hair pulled pretty diddlying hard in the past and I doubt a balloon would be worse.