Have you actually tried taking unrepentant time off, where you have no work or social obligations, and grabbing unhealthy snacks and drinks, curling up with a good game, and zoning out of reality for hours or days at a time?
Sex is nice and all, and we're hard wired to like it more than most activities, but it does not hold a single candle to unrepentant free time when you're not used to said free time.