"The abandonment of the reproductive function is the common feature of all perversions. We actually describe a sexual activity as perverse if it has given up the aim of reproduction and pursues the attainment of pleasure as an aim independent of it. So, as you will see, the breach and turning point in the development of sexual life lies in becoming subordinate to the purpose of reproduction. Everything that happens before this turn of events and equally everything that disregards it and that aims solely at obtaining pleasure is given the uncomplimentary name of 'perverse' and as such is proscribed."
- Sigmund Freud, Vorlesungen zur Einführung in die Psychoanalyse
In other news, other varied forms of unproductive assplay or watersports will have come at a price:
Europe's demographics also aren't on the side of growth. Populations across the developed world are graying, but Europe's low productivity growth means that its future labor shortfall will be especially acute. It doesn't help that Europeans draw social security benefits earlier and more easily than their developed-world peers.