When your dick is to wide for someone's jaw; it cause the temporal mandibular joint(TMJ) to stretch and become sore. Similar to a snake's jaw almost breaks during feeding.

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

When you're receiving a blowjob and your dick stretches out the back of the giver's throat. It is named because this phenomenon is similar to the way a snake's throat stretches to accumulate a large prey items during feedings.