Lollllllllllll no I'm not serious.... well, your wife does seem p cool from what you've shared
I do ok w the type of girls. I've never worried about a girlfriend cheating, though. I make sure to go down, make sure sex is good, all that.... but even if i didn't, I don't think they would cheat. Well, maybe if we were together for like 10 years and she was incredibly frustrated.
Sex is different for a girl. It's not like they get blue balls if they don't cum during sex...I think the act is more about intimacy and less about busting a nut for them. Of course it wouldn't hurt if you get them off, but if you don't it's still enjoyable for them. Whereas if a guy doesn't bust, he's thinking "Damn what a waste of time"
Maybe I'm just blissfully unaware 
depends a lot on the girls. I had the advantage of being the booty call for a few of my female friends when I was younger... and youd be surprised how many times they would come knocking on my door drunk late at night because their BFs werent getting it done. My experience mau have been different since I tended to be the guy they came to in between BFs....
of course their BFs weren't super serious or anything.... and one of them was a psycho whore. ... but the others were just regular chicks in their early/mid twenties that liked to drink.
conversely, ive known many chicks that people would think are total whores that never once cheated. So it s a crapshoot i guess.
Youre absolutley right about girls having an emotional need more than men... but they also have sexual needs just like any other animal. ... and of its not satisfied sooner or later theyll go find it.