it made me think of telling my girlfriend about what is bitcoin , i will tell you after what was he reaction :p
It is either she will accept bitcoin or will be very difficult for her to understand it, But it is good if she take it more seriously because a good relation needs understanding and no secrets involve.
And it totally depends on us that how we introduce them to bitcoins as mouth publicity is the biggest publicity, if you introduce them positively they would surely be get attracted to know more about bitcoins, the technical things and where it is generally used for, and once they are aware that they can use bitcoins for shopping, they would be surely get motivated to use bitcoins.
Yup! that will apply to some girls but a drastically high rate in numbers of girls have difficulty in understanding bitcoin I have encounter some, but I am not saying all of them are like that for some cases there are still few that is interested with bitcoin that I have teach how to make their first wallet introducing them a lot of faucets and making an account and posting in this forum, so I guess you will never know a girl who's in with bitcoin.