1.  The famed "wanna screw" email - Would you walk into a bar, find an attractive woman, walk up to her, and say, "Wanna screw?"  If you would, you probably already have, and I've got a pretty good idea what type of success rate you've had with that.  However, if you're like most of us, you probably would not, and it's no different online.  Most women like a little bit of conversation before they even THINK about getting in bed with you.

2.  Penis pics - Guys, I hate to break it to you, but yours is probably not the first she's ever seen.  And, most women will tell you that a picture of that organ alone, with no idea at all of what it's connected to, is not going to pique their interest.  A face pic or full body shot will generate far more interest.

3.  Treat Them Like a Piece of Meat - Just because a woman has joined a swingers/sex dating site, it doesn't mean she's only interested in connecting her sex organ with yours.  As proud as men generally are of the organ between their legs, woman are just as much (or more so) proud of the one between their ears.  And, knowing that you actually have one between yours (ears) that is capable of actual thought will make it far more likely that they will eventually want to get acquainted with the lower organ.

4.  Brag - Again, I hate to burst your bubble, but it is unlikely that you are actually "The Greatest" at any or all aspects of a sexual encounter.  You may have had some great experiences, and the other person may have also, but doesn't mean every woman will react the same way to your specific talents.  Don't get me wrong.  Being confident is one thing, but it goes back to that "upper organ" again.  Making a mental connection with someone, finding out what each other's likes and dislikes are, will lead to the best sexual encounters.

So, remember guys, it's not like walking into a store, picking out the one you like, and taking her home.  You can't just throw a picture of your privates out there, profess your sexual prowess to the world, and expect them to come begging at your door.  Just like any relationship, you have to put in some time, get to know her, let her get to know you, and then you will be on your way to some great sex.