Leprechauns

[Donald Trump]

The [pains] chiefly associated with a males erection grinding against his female partner during heavy sexual play. See [dry humping]. Often adding to arousal at onset the pains proceed to become excruciating and ultimately frustrating, often reducing the ability to retain erection (hard on).
Origins:
From Irish folklore, where a leprechaun was a little man dressed in green who would appear at forest edges and was rumoured to possess a [pot of gold] at the end of a rainbow. Often men who sought these creatures would enter great misfortune and suffering would result. As such a man who seeks sexual fulfilment from a woman who refuses to give it will suffer the pains in his groin as a result of dry humping, known as leprechauns.