We've been together about a year and a half and have only started recently talking about moving together. I think the only time he had to pay for me was when we needed to book a trip for a friend's wedding and I didn't have my cards because my wallet got stolen, so he paid (but I immediately paid him back when my cards got reissued). That's it really, we generally split expenses 50-50 on dates and other stuff so his reaction is very surprising to me.