With my ex-wife we first had an 'honour' system where I simply didn't masturbate and was usually given relief either through intercourse or other methods two to three times a week. However, I often went without for a week or two, or even longer (five weeks on one occasion). The longer I'd gone without the quicker I would come so at first we had a training system where I'd be tied to the bed for sex and had to hold out for several minutes the first time, increasing by one or two minutes each success until I was managing about fifteen minutes. If I failed the duration didn't increase but I spent the rest of the evening (usually going to the pub during the week or a restaurant on weekends) in an increasing amount of women's underwear which she'd deliberately picked to be uncomfortable.
If I came before her, she would stay with me until I was hard again and had reached orgasm, usually meaning I ended up just as frustrated as if I hadn't relieved myself for days.
Later we used delay spray (a topical anaesthetic like Stud 100) so she could enjoy 20-30 minutes of sex without the risk of my finishing. At the end, she might allow me relief, but more often than not would 'save me for later', meaning we'd have intercourse four or five times a week but I'd only get one orgasm, albeit a very powerful one.