Huh? Who said anything about using Facebook or Myspace to chase girls. If thats the idea we gave you then it was the wrong one.
I use Myspace and Facebook to talk to old classmates, college friends, family members and friends. It gives you a "online place of your own". My space really gives you your own creative way of expressing yourself to friends. You can change your layout to sports teams, celebs, special interest. It really lets you customize what you want. Facebook is cool as well, where as you can add applications to interact with your friends.
True this doesn't replace general physical interaction, but its a cool way to get in touch with family and friends that are far off. Plus it saves a lot money...less phone bills.
Chating on a forums is cool, but it limits what you can and cannot do. Matter of fact try Myspace and facebook out for a week and see if you like it. If not, just cancel your account. But I'm sure you will want to keep it.