Classic

i believe it's called stoma.

Can it be on a forehead? Will be very useful during unwanted conversations.

Things you can say during an operation and during sex

The peak of medical science!

they are commonly made when a newborn with anal atresia ani is born

I see Blackjack I upvote!

This one would be a anus breaking one.

many ppl just have a bypass through their mouth

I think it would be a blessing for people who lost theirs e.g. to cancer