I can understand the point Harlan is making. The need for contraceptives and their use, can create the behaviours where the need for contraceptives emerges. The long term effects are upon the psyche and self esteme of the individual, when they realise they've used their bodies like cheap amusement park rides. (Like that analogy by the way).
It's an interesting point. That so much research is being done, continually, into contraceptives and their effect, yet we barely question their necessity.
Huge amounts are put into the createion and improvement of various contraceptives, yet practically none into the need to use them continually.
The continual use tends to create the season tickety mentality about sexual availability.