As with anything which is enjoyable, the more variety you add, the more pleasurable it is. Meals which are fun meals, ritual meals, festive meals. The more variety, the more fun they are. With maintenance meals, it makes no difference, you eat for one purpose, to fill a void, and the fuel to keep going. But ritual meals such special occasions should be varied to add that bit of something to look forward to, which makes the event and the meal that much more special. Sex should be fun for both. Variety adds that what makes each time special.