When I was on my gap year between high school and university, I went with my youth group to Israel. Because of the risks involved (and the even more pressing dangers imagined by our parents), the guy in charge of our program needed to answer his phone when it rang, no matter the time of day or what he was doing.
Quite often he would answer it sounding out of breath only to tell me, when he found out who it was, to call back in ten minutes. A few months later, he announced his wife was pregnant. We assumed that they really had to work at it.
Who gives a flying fuck if you're interrupting intimacy, bastards should only be sexing for bebez! The more you interrupt a couple the more grateful they are.