And what about the situation that we've heard here more than once where the H says, "We had plenty of sex during the first years of our M (sure I always initiated, but I thought that's the way it was supposed to be), then one day my W spoke up and said she never enjoyed it and it was always for my benefit."
To go back to the tennis analogy. What if I call you every Saturday to play tennis, and you say okay, and we go. This goes on for a long time. You never call me to play, but whenever I call, you go. Then one day, I miss calling you, and you don't call me. Then next Saturday I don't call you a second time, and you don't call me. Am I not going to wonder if you really wanted to play at all? Or were you just going along with it 1) just for me or 2) as long as you had to make no effort.