As a guy I am not that interested in having babies, we have reached a point where we are not facing underpopulation anymore and will not face it any time soon.
But for Ecclestone having a baby at 90...that's his POE (Proof of Erection), I tip my hat to that.
In any event sex in the 80s and 90s is common for people who arrive at that age healthy enough. It's a known phenomenon in retirement homes.
Ecclestone just improved his odds of arriving at that age healthy enough due to his wealth and also the odds of having a young woman to have sex with as opposed to other octagenarians.
with a bit of luck (or bad luck according to each person POV) the end result is a baby.