For starters, we all know that in the real world women will usually not pick up guys, so it is fair to assume that this mentality extends to the virtual world as well.
Not less important is the fact that there are many more men looking on the 'net than women.
And one thing that should be worrisome for straight men is the size of their disadvantage in the market.
If you can create interest in a woman and have her reply to your message, there are much better chances this will develop to something.
This is not some lady who browsed your ad and replied out of boredom, this is a lady that wants to get to know you.
One of you may be new to the area, and would like to know more about it.
Online dating: It is not that hard, and yet so many people make it so hard.
A one-sentence message probably isn’t saying enough, but you also don’t want to send a novel.