Another explanation is that it appears they think they are losing their hotness, their allure and they are never going to budge on getting more youthful folks to screw them to disprove that mean case.
Remember how Mommy used to breastfeed you? Mommy is your toilet slave and cum slut now.
You may be young and still developing, but I want to ride you until you cum inside of me.
They are excited to be passing on their expertise and the entirety of their unusual moves to the more youthful age and simultaneously getting their openings loaded up with new meat as well.