I think even with reduced sex drive, the chances are that you would still be able to have sex successfully at least 3 times in your fertile life. The "issue" –

I think even with reduced sex drive, the chances are that you would still be able to have sex successfully at least 3 times in your fertile life. The "issue" – and lets face it, a gradual, managed decline in population is just what the Earth ordered – is that we have collectively decided we would like fewer kids and are deploying birth control.