So this is what Dory from finding Nemo felt. Now you know.
On a side note, this is how the dark legend of peeing on stings keeps on perpetuating, I believe:

• Guy rubs sand on his chest until is super red.
• Approaches lonely girl: "I've been stung by a jellyfish, please help!"
• Girl immediately drops panties and without a second thought, pees.

Pervs.