Many girls will argue with you after such gesture, but act as you don't care and in first next situation do the same.
Like previous thing, I don't know WHY but this works for whole my life, with both older and younger women.
Keeping that fact in mind when approaching any girl or women will dramatically increase your chances to get sex , one night stand, affair or f-buddy with / from any lady.
All you need, to find, and get any of them, is just to think how would you act on their place? Understand facts related to their lives and you will easy get to the point.
Women are just like men: they want some excitement, adventure and sex, but they usually are not so direct as males are.