What do you think Benny would be like in a relationship?
Like dynamite -- in good ways, and bad.
Let's just clarify, first of all, that we're talking about an actual relationship here -- the idea of Benny having a 'my girl,' not just a 'my favorite girl.' I imagine he has enough of those to keep him busy already.
On the upside, if you got Benny hooked, you better believe he'd think you're the creme de la creme, the apple of his eye, because a guy like Benny won't go good-n'-faithful for anyone he's not convinced is the best of the best. Got to be up to his standards, after all. The point is, he'd take genuine pride in his woman -- parade her around, show her off, take her out, shower her with gifts, and see to it that she went in style.
Oh, and sex. Lots and lots of glorious sex.
But add to this Benny's egoism, lack of loyalty, inherent treachery, underhanded tendencies, and surmounting self-interest, and you've got your work cut out for you. He's not trusting, and he's not trustworthy; he's sporting bonafide 'evil karma' alignment, stabbed his former boss to death in a knife fight, shot old Six there twice in the noggin, poisoned his own lounge singer, cheated his henchmen and gave them the slip, and tried to usurp his new, giant-computer-boss as well. He would have gotten away with it, too; if it weren't for that meddling courier and his stupid dog. If Benny's not going to put a man's life above his own ambitions, he's sure as hell not going to put his lover's needs before it. That means, one moment he's draping a new fur around his pretty kitty's shapely shoulders, and the next moment it's, Sorry honey-baby, duty calls. What? Anniversary? Baby, you know how it is. Business is business. Now don't go getting clingy; I'll bring you something nice in the morning. Adios, toots! Stir this up with a healthy dose of stubbornness, the fact that being proud of you doesn't mean you're important to him, and the fact that half the care he'd give would probably revolve around his desire to have you reflect well on him, and you've got a brew for plenty of heated arguments. He's not a misunderstood anti-hero with deep, psychological problems, he's a guy with more gaping personality flaws than you can shake a stick at. A man. You'd have to have some real stick-to-it-ness to swing with this cat, and take the ups and the downs as they came -- and boy, would they.
Oh, and he drops ashes on the carpet. Good luck.