Even if they have talked about it, a woman rarely wants the proposal to be public, and I don't blame them one bit.
I think it's exceedingly douchey to orchestrate these public spectacles. Too much can go wrong, and it really should be a private matter unless the girl is a total AW.
And if I EVER find one of you kneeling in supplication to ask a a girl to marry you I will personally kick your ass up and down the street. That kneeling is the mother of all supplications... "I beg of you, would you honor a poor, undeserving sap like me by condescending to be my bride?" When I see a man kneeling in supplication before a woman asking for her acceptance it sickens me. It's unecessary DRAMA that you learned in the movies and I guarantee you that even most girls subconsciously find it disturbing.
A woman NEVER wants to see you supplicating to her. Some of them will say otherwise, but it triggers a very bad response in them subconsciously that gets tucked away. When divorce time comes around in her hamster cage, that picture of you kneeling in front of her will work decidedly against you.
Should a man be pleading with a woman on his knee(s), offering her gifts in order that she will say yes, so that she will "make him the happiest man on earth"? Or is HE offering HER an opportunity for a lifetime of security and provision?
/rant