Whether we like it or not, sex is one of the most enjoyable mysteries ever created by God.
Whereas the man to woman intercourse is the natural way of enjoying this intimate relationship, we have had different ways over time.
Arguing the morality of these other ways is not the point I'm making here.
But whether it is between man and woman, man and man, or woman to woman or even other forms of finding release, sex and its importance is not and cannot be underestimated.