Because I believe a relationship (especially long ones) are the ultimate challenge. In my opinion, STR's and ONS or getting a girl to be a sleeping buddy (yes... even in High School) is just too easy for me. I understand not only human dynamics and psychology, but female dynamics and psychology far too well. However, when you enter a long term relationship... a lot of those dynamics change because you have to start juggling sooo many things at once. You can't be as much of a challenge... but you can't be too little of one. Things like emotions start to cloud your judgement... and a host of other factors. So, in my opinion, it is easy to get girls... but keeping them is the difficult part.
Beyond all of that, I am with a girl that I love. She is a lot that I like in not only a girl, but a person in general. I don't have to be around her 25 hours a day, she doesn't always have to know where I'm going, or what I'm doing. She doesn't mind hanging with my friends (in fact she encourages it) and most importantly she gives me total freedom. She's not big into things like flowers and chick flicks (in fact she told me not to get her anything for Valentine's Day, and got mad when I did
). And I love her a lot, and believe me when I tell you guys (and remember I'm not too much older than you guys) being in love with someone is an indescribable feeling... but it is a feeling that is better than laying a girl every day of the month. (damn... that's game)
The Matrix: Reloaded