A man donates blood to his wife after she is badly hurt in a car crash

A man donates blood to his wife after she is badly hurt in a car crash. A
few years later they go through a bitter divorce and he demands his blood
back!.

So she throws a tampon in his face and says "there you go you miserable git,
I'll pay you back monthly!" And the moral of this story is :-

Even if a woman eventually pays back what she owes a man!, there will ALWAYS be a string attached!.