I once heard a story from a friend that when he was a bochur in a yeshiva (near the home of @meivinyavin ) a freind of his realized when learning kidushin that he had a problem. Years earlier he had been hanging out with some friends (boys and girls) when he played a claw grab game and one a little prize. One of the girls asked him for the prize and he replies if i give it to you will you marry me to which she replied yes and he gave it to her. Supposedly the rosh yeshiva Harav M. paskened that will you marry me is a loshon of the girl marrying him (being mekadesh him ) and not him being mekadesh her and therefore does not require a get.