Can you unsubscribe someone from your YouTube?

Some strange Brazilian whose big love is apparently “Male CPR/CPR Men” (I’m serious) and his whole channel is full with pictures of shirtless men getting CPR.
That’s quite strange and gay and I’d rather have this person unsubscribed, but I can’t find a way to do that.
Is there an option for this?
Thanks in advance.
Answer #1
Now that’s even stranger…
He has some “Questions-Answers” on his page.
One of them is (obviously?) “Are you gay?”, he said “No”, but again, guess what video did he subscribe from? A Baywatch parody commercial I’ve uploaded where a guy receives a… CPR (there are 3 hot chicks doing it as appropriate for Baywatch, but still).