This guy is displaying incredible restraint. I for one would quickly devolve into a mindless savage slamming away on the young pussy, nuts swinging in all directions and sweat running down my ass crack like a raging river.
Kylie from Cum4k is hitting him with the honeypot, She's a tiny chick capable of producing enormous amounts of cum and she can't be stopped using conventional weapons.
Grandpa had the first meaningful erection that he's had in 30 years. Gramps might need a belly full of Viagra to get even a hint of a boner with his wife. But...throw him a hot young fuck like Anneliese and he'll drive railroad spikes with it. Good score old timer.