I was told that true believers of the (Islamic) faith allow NOTHING to go IN or OUT of the body from sunrise to sunset.
That means daytime bonking is out for you, Slasher!
Additionally, in its purest form, a Muslim should not even drink (water) during daylight hours - however, I also understand that the Quoran exempts travellers from these prohibitions, and in the interests of Safety pilots of the Islamic faith in Malaysian Airlines during my tenure there, were reminded of the critical side affects of abnormally low sugar levels that are induced by fasting.