It's damn easy!
Ok so you've joined a couple of dating sites. Well if you really into getting laid online, you should play it a certain way. Yes, there are women using dating sites just to get some action; but most are looking for husbands! Or boyfriends with potential. Actually, you really don't even want to meet the women just looking for s - x... most of them are skanks who might give you an std. You can get plenty of action going after the girls looking for relationships.
Show me the best dating sites for getting laid!
Remember that although most women like funking around, they usually don't wanna just dive into bed right after they meet ya. The average girl would find it sleazy to do it on the first date; but then be totally cool with it after a couple of dates. So you do need a bit of patience. But if she hasn't put out by the 5th date, then cut your losses and move on!
Most members of internet personals sites are single; but there's always some married ones as well. In fact, Ashley Madison is a site that's just for married people. But unless she is in an open relationship, I'd avoid the married ones. Too much hassle, like husbands coming gunning for ya. Singles put out just fine.
Don't be a dick and dump girls after doing them once; that just says you're a jerk. Go for it a few more times. Dang, if she's great in bed than milk that sucker as long as you can! It's not really that hard to do that while dating others women - just be smart about it.
Now go out and have some fun! There's lots of hot girls on these sites; and its easy enough getting laid online. Good luck!
Oh and while you're at it, maybe try dating mature women too :) Its fun!