Some people just don't want to be helped.
If you're really shy, have really low self esteem, have little to no dating experience, a strong will is needed to break out and look for dates/sex. I don't think greeny is there.
In my case, it also helps to have someone specific to crush on, and have the desire to ask that particular person out. Just the thought of, "man, I need to get laid," sometimes isn't enough to get past the "nobody will ever want me" stage, which is where I think greeny is at.