How is sexual intercourse not natural? Apart form the fact that we often do it indoors, between dry warm sheets, we do it pretty similarly to other mammals.
As our genitals generate pleasure, they are definitely for pleasure.
A majority of sexual intercourses do not lead to procreation, but to either nothing at all, or to an early miscarriage.
Human offspring is so helpless when it is born, that it needs its parents' care for several years. In order for the parents to want to stick together that long, human females have permanently swollen mammary glands; a sign that our genitals ARE for pleasure.
Procreation is not dependent on people being "very much in love", it can happen on one-night-stands, even with rapes.
You have a VERY romanticized view on procreation, dolt. The sperms can live in the vagina/womb/Fallopian tubes for about 7 days. The egg can live for about 4 days in the tubes/womb. In other words, fertilization can happen up to a week after the intercourse.
Have you EVER had sex, Eoin? Flaccid penises don't enter vaginas, only erect ones do, dolt, and the vagina is not a vacuum. It's normal to use hands to guide the erect penis into the vagina.
I'd say your imaginary sleep-intercourse is more forceful than normal sex usually is. According to you, both the man and woman are unaware of the sleep-intercourse, and it's therefore non-consensual.
