When a woman sits on the toilet backwards, a man then sits behind her. He places his erect penis flush against her anus as she begins to shit. As each turd is released and breaks off, the erect penis slaps back against the anus. This creates the distinct slapping sound of the Texas Mudflap.

When you eat dirt for the first time and leave your family to build a shack in the woods

A Texas Mudflap is the act of a woman (or man) lapping their tongue on the man's butthole while holding his nuts in her mouth like a greedy squirrel.

This is similar to tea-bagging but with an extra step for added degree of difficulty.

Proper preparation is to have the man's anus partially or fully shaved. A hairy butthole changes the act to "Millionaire's High Tea".