I defer to your knowledge on this
my comment was a general one
The chances of a woman getting up the duff over the age of 40 diminishes
As you highlight best not to assume
However in civvy world going in commando is difficult to resist
With women i've met who have their head screwed on [if they haven't i usually pass on getting things going with them] the general consensus is not to cum inside
No guarantees, however improves the odds
& i do like a CIM finish, so a win-win [fingers crossed]
It's not as simple as that so you shouldn't always assume. Just take care no matter what.
There are loads of older women that are fertile, and loads of younger women that aren't.