It definitely depends on the people in the relationship. I, for one, connected instantly with a girl I met when I was only 15 (she was 13), and we had a strong romantic relationship that lasted for 4 years and we're still friends today even though we're with different people now. Before dating her, I had never been with someone younger than I was, but honestly I didn't even notice it. If you have someone that you connect with on a level deeper than age, especially if you're both at the same maturity level, then age doesn't really factor into the equation at all. Not saying I condone relationships between, say, an early-20s man and a young teenage girl, or vice-versa to avoid being sexist and stereotypical; because most of the time that's just asking for trouble and one of the involved parties is up to no good. But if it's a few years difference, just enough to make it awkward; or if the woman is older than the man in a heterosexual relationship, another thing that many people find to be uncomfortable, then it's down to how you and your partner feel about it. If neither of you feel awkward, who cares what anyone else thinks? As long as it's a healthy and happy relationship, nothing else should matter!