Especially if you're with someone who is in a wildly different financial situation than you are, things can get pretty awkward once money is involved. If one person makes more money, is it fair to split everything? If you move in together, should you split the rent equally or do you work out a system based on utilities, groceries, and other expenses? If one person decides to take on all of the financial responsibility in a relationship, is it fair for them to hold that over the other's person's head? There are a lot of problems that can arise, which is why the first few weeks of dating is usually just one big, long wallet dance of "I'll pay" or "no, I'll pay" under the restaurant table.