Maw is outside hangin' up the laundry, when she hears Paw in the kitchen.
Maw walks in and says, "Paw, get out there and fix that there outhouse."

Paw says, "All right, Maw." Paw walks out to the outhouse, looks at it, and hollers, "Maw, there ain't nothin' wrong with this here outhouse!"

Maw says, "Yes, there is. Put your head down in the hole."

Paw says, "I ain't puttin my head in that there hole!"

Maw says, "Well you're gonna have to if'n you're gonna fix the problem!"

Paw puts his head down in the hole (just a little bit mind ya) and he hollers, "Maw, there ain't nothin' wrong with this here outhouse!"

Maw hollers, "Now pull your head out of the hole."

Paw goes to lift up his head and he says, "Oww! OWW! Maw! MAW, my beard's stuck in the cracks in the seat!"

Maw says, "Aggravatin', ain't it!!!"

is this joke refering to what I think it's refering to?

Hannah Hannah Hannah.  Shame on you!  Got any more?

Let me be the first to say, EWWWWWWWWWWWWW!

I don't get it.

One time, at band camp...