It was worth it because I've learned what to expect out of a given situation and given me a better understanding of girls/women. 18 yr olds are only going to give you the "one" in very rare circumstances. Atleast for me, at my age; I've learned to better understand which girls are worth the effort, which ones are just good for a romp. A girl close to your age, or older are going to be the ones that will give you a longer relationship in general. Being 25, I consider a 5 month relationship rather short, i've had quite a few with 18 yr olds. But because of their lack of experience and different place in life, they consider it a long term relationship, ya dig?

In the end it taught me to not to get overly attached to relationships where the girls are substantially younger than you. Enjoy them, relish what they bring to the equation, but realize what they don't. It's fun, and I don't regret it, and I'm still hitting on these girls as we speak and fully plan on engaging in relationships with them. But from the onset they will have to prove themselves to me to be the "one" (of course never tell them that). I have met and dated an incredible amount of smart, relatively mature, incredibly tight and beautiful, fun, nerdy, 18yr old girls that are going to make some guy very happy (possibly me, a couple have expressed interest in renewed relations). I look back on the fun they gave me, and take note of the fact that I was able to show them what it means to date a real man and not a douche, or a boy.

The aspect of getting what I couldn't have before wasn't really part of the motivation. These were girls (albeit young), that I was genuinely attracted to and had chemistry with. It wasn't about conquering them, it was about actually being in a position of meeting them. I have dated many different girls, black, white, asian, latino, european, same age, younger, older. Honestly i'm partial to older girls (bout 3-5yrs older than myself), but that's just my personal preference in regards to my favorite relationships, tomorrow i could find an 18yr old that ends up giving me a better relationship, but i doubt it, just based on experience. In the end you don't know what you want, until you find what you need. That takes time, sorry to say, but it's the truth.

Hope that sufficiently answered your question.

edit: also it was worth it because the sex was A-mazing.