The event in which your smartphone's Facebook messenger app makes a dinging sound causing you to check said message only to discover a conversation about anal sex. In that conversation, the word "ding" is now a reference to that event. Further, the use of the word "dong" as a reply to an anal dinging adds further hilarity as this is a reference to the male genitalia often used for the aforementioned anal sex.

A pubic hair piece. A toupee for the pubic area/genitals. In the 1700’s when mercury was used to treat sexually transmitted diseases (Gonorrhea or Syphilis) one of the side effects was the loss of pubic hair. To disguise this condition, that was not cured by mercury, a Merkin was employed.