Since you're an old guy in his 70s (cough cough xD), you'll be a small, playful cat.
Strip naked, get a collar with a small bell on it (if you don't have something like this, nvm then ^^)
Get yourself some balls of wool (at least three).
Then, your task is the following: You have 30sec time, to masturbate. If the time's over, play 1min with your woolball. Then repeat.
Do this until either you cum or all your wool balls are completely unrolled.
If you managed to cum, play with your wool balls as long as you like, and if not, well, then it's also no problem.
I hope you enjoy it, if you did, pls pm me a report
Pick an animal for me, but make it slutty :3