Unsuitable partners.

Do you know someone who-without fail- always dates the wrong type of person? I do. Although she is more a pal of Etheline than of me, but still.
This girl seems to have a built in radar for tracking down the biggest asshole in any group or room. It's uncanny. I mean we've all dated our fair share of unsuitable people I'm sure. Certainly I went out with an asshole for some time, and WORSE, I was an asshole when I went out with him. It was like alchemy, we brought out the asshole in each other.
But then you grow up and with a bit of luck you learn. You say to yourself, 'hmm, I was dating an asshole, I won't do that again.'
Right?
But not this girl. This girl doesn't seem to have that shield, or buffer, or what ever the hell you call it. According to a rather exasperated Etheline, her current beau is an even bigger asshole than the last one, and he was a black hole of assholes, such an asshole he had his own gravitational pull.
He would play 'mind games' with her, calling her one minute, then not calling her or answering her calls at all for a week to ten days at a time, claiming he needed 'space'. Then he took her away for a romantic weekend but wouldn't have sex with her. Then he refused to let her call him her boyfriend, insisting that they were not and that they had an open relationship, all fine and dandy if that's what she wanted, but it wasn't. The real killer is that the worse he treated her, the worse he behaved, the more desperate she was to hang on to him, I'd have given the dumb fuck all the space he needed, and that space would have involved him never coming within a kilometre of me again.
When he broke it off with her, she was gutted and cried for months over him.
So it was with extreme caution Etheline greeted the news she had landed herself another prize and with dubious heels on Etheline went to have a drink to meet this new beau last night.
'Well?'
'I don't know how she does it.'
'Oh God, what's wrong with this one?'
'You mean apart from the fact that he's married?"
'Oh dear.'
And you can be sure this one will be ugly.
But why? WHY? She's not stupid, she's good looking, she's got a great job, her own home, her own car, why WHY does she always pick these losers? What gene does she have that makes her hone in so perfectly on the one jerk in a room full of perfectly nice men, that causes her legs quiver at the mere whiff of an asshole? ( yes I know how that sounds)
I don't get it.
Anyone?