The son is wrong!

Human sexual desire mostly will last into eighties. Having sex is ok for the man but not driving a convertible.

The girl is going to share the old man's wealth to make the ecconomy run smoother. This is way better than those French guys who do their own daughters and pass along the bad genes.

The son is stupid, too young, eih? Wait when he is in his eighties'. If all possible, I would pay for my daddy!