If a women goes to a restaurant, can she request that her dish be ejaculated on? And if so, is there people in the restaurant who's job that is or does the chef do it?

It’d probably be a waiter, for freshness.

You might enjoy this story of mine: http://www.asstr.org/~Broken_Arrow/2015/07/42-abbey-and-mackenzie—dinner-and-the-deep-throat-special/