Full Idea
If the act of procreation were neither the outcome of a desire nor accompanied by feelings of pleasure, but a matter to be decided on the basis of purely rational considerations, is it likely the human race would still exist?
Gist of Idea
Would humanity still exist if sex wasn't both desired and pleasurable?
Source
Arthur Schopenhauer (Parerga and Paralipomena [1851], XII:156)
Book Reference
Schopenhauer,Arthur: 'Essays and Aphorisms [from Pand P]', ed/tr. Hollingdale,R.J. [Penguin 1970], p.47
A Reaction
This is almost certainly correct in the modern world. In tougher economic circumstances people seem desperate to have children who will help them survive.