It depends. How much younger is this younger woman? If she's around 21 or younger, I'm going to have some doubts about her going out with an "older man." But if she's around 24, I'm going to give her the benefit of the doubt (seeing I don't know her personally) and say she's mature enough to handle this kind of relationship. Yes, under normal circumstances age does mean something. Keep in mind that girls often think they're more mature than their peers when in reality they're just where they're supposed to be.