"In lieu of TP" joke

Two guys are driving on a desert highway and had gone a long time without seeing any buildings or bathrooms.

After a couple of hours like this one guy says "Hey man can you pull over I really gotta crap!"

The other guy said "sure" and pulls over. He then said "hey what are you gonna wipe with? i don't have anything in here. I know! Use a dollar!"

"All right that's better than nothing"

The guy comes back 5 minutes later with crap all over his hands and his pant legs.

"WHAT THE HELL DID YOU DO!" the driver exclaimed.

He responded as if the driver was stupid and said "well you would have crap all over your hands too if you wiped with 3 quarters, 2 times and a n