An old man...

An old man, living alone in a hut in the mountains walked down to the village one day. He went to the doctor.
- I want to be castrated
- No? Surely you don't want to do that?
- Yes, I do! Please castrate me!
And so they did.
When he later walked back up to his hut he met another man, also living alone in a hut in the mountains. The other man said:
- Hi there! I'm going to the doctor. I'm going to be vaccinated.
- Vaccinated! That was the word!