Why not? I'll chip in my two cents. Just remember that it's only worth two cents, if that.
I'm 23, and this girl I have been talking with for the past few months is 18. Legally speaking, it's fair game. However, there are things that even I have to take into account before I look at pursuing a relationship with her. I'm a college senior when my next class starts on Monday, and she's starting college in the fall. I've got a year and a half left and by the time I start grad school, she'll only be halfway through her undergrad. Even if we're both legal adults, we're in slightly different stages of life right now. Not to mention there's still a gap between 18 and 23 that can't just be measured in years. There's a lot of experience that happened in the last 5 years of my life that has definitely contributed to shaping me into who I am today. There are references and jokes I make that she doesn't understand until I explain them to her, and vice-versa. Career-wise, I'm looking at becoming a family counselor, and she wants to be a medical translator. I'm already looking at starting to pay on my student loans, and she's looking at starting student loans to pay for her education. Those are all things I need to take into account when I ask myself the question, "Do I want to pursue a relationship with this girl?"
The idea of somebody who is 19 pursuing a relationship with somebody who is 14, to me, seems not only incompatible but appalling. There is a plethora of concerns. One is starting high school while the other is either in college or looking to start college. Has the 14-year-old ever had a job? How many jobs has the 19-year-old had already? Is the older of the two ready to financially fund the relationship in addition to his own life? In the case of a 19-year-old pursuing a relationship with a 14-year-old, it's obvious that neither are emotionally healthy enough for a relationship with anybody yet. If the 19-year-old is insistent that he only finds himself attracted to younger girls, then perhaps he needs to wait a few years so he can pursue a relationship with a younger adult. To agree with Jess, the 14-year-old shouldn't even be dating yet anyway.
OP: I wouldn't say there's anything abnormal about being attracted to somebody a few years younger than you, but I would advise you to either find somebody who is 18+ or wait until that attraction is legally okay. Regardless of what you may think or feel, you're still bound by the laws of the land.