I'm not as experienced as many on here, but I do have a couple of stories. I've heard "keep your SMV higher than your wife" used by married guys quite a bit. Its unicorn hamstering.
Let me share a brief anecdote.
I know an ex couple, both in graduate school. When they got married, she started demanding more extravagant living arrangements. He complied by taking a side job in a dangerous field. Superficially, this guy seemed quite alpha and no bullshit. He lifted. A lot. I've seen him rep 300 lbs on bench. He took care of his shit. His research project was stellar. Spoke a few languages, well traveled, cultured, shot guns, fixed cars, and was a nerdy academic on top of it. He never had a problem dating girls.
She, on the other hand was not attractive. Four out of ten by our consensus. We couldnt believe it when they got engaged. Afterwards, he told us, quietly, that attractive girls are a pain in the ass. She was so happy to be with him, he thought she would never blow it all up.
All that nice girl stuff stopped, according to him, right after the wedding.
This relaxed,handle any problem guy turned moody. It turned out, she put him in a dead bedroom right after the marriage.
I'm sure you're thinking, "well if it was me.. i would this and that." Ok. Heres what he did.
He responded by getting in even better shape. He worked out more. We found out his game at home was to mention the deadbedroom once and to wait it out while he would hit the gym. He wasn't going to beg. This motherfucker waited 6 long months and she never put out.
After 6 months he gave her a fuck me or divorce me talk. She then doled out just enough sex to keep him from complaining. They had no kids and no assets yet, so she had nothing to hook in. She also got fatter, too. Five foot 3 and 150-160 lbs by my guess.
Now, for their degrees, they have to travel. She got quite a bit of academic pussy pass and had overseas trips handed to her, and she left a lot. He was miles away the better student and didn't get the hand outs. He struggled and worked his ass off and he finally landed the big white whale of grants.
If you thought she would be happy and reciprocate for all the times he had to stay at home - please consult briffaults law.
She was initially happy and then grew jealous and resentful. He had a hard research assignment, and, over time, her early support grew to envy and this gave him a lot of stress.
What does this girl do to work out her jealousy? She took another one of her short trips abroad and fucked a guy. Bareback. Was this guy some "alpha?" No, how about a balding, skinny, cancer patient.
How did he find out? He got a bacterial STD. He didn't fuck anyone abroad, and when he got home, he got a discharge. She denied and denied, and one of her friends ratted her out.
Now, this is the part where someone says "but.. but.. foreign trips." Ok. He also found out, later, she fucked another guy at home. Lets not kid ourselves. If a woman, even an uggo, wants to bang some dude, its not hard and she doesnt need a trip abroad to make it work. Don't kid yourselves. AWALT, and you can't manufacture a hamster by dating uglier, keeping her from taking trips or what have you. AWALT.