An undesirable Sexaholic who struggles to have sex meets a fellow, female, sex addict who teaches him other dangerous methods to starve off his addiction.

"An undesirable Sexaholic who struggles to have sex, meets a recovering female sex addict who teaches him dangerous methods to overcome his addiction." ...and maybe give him a little bit on the side... lol, just kidding. :)

"An undesirable sex addict struggling with his addiction meets a female sexaholic who teaches him more dangerous ways to satisfy his lust"

I think overall this is working well. It sounds like it could be fun and exciting. I guess if you're going to be nitpicky, using the word sex three times maybe can be cut a little.