Drunken Irishman

[rebbonk]

A drunk Irishman staggers into a Catholic Church, enters a confessional booth, sits down, but says nothing.

The Priest coughs a few times to get his attention, but the drunk continues to sit there.

Finally, the Priest pounds three times on the wall.

The drunk mumbles,

Spoiler:

'Ain't no use knockin, there's no paper on this side either.