The instance where a person gets an erection figuratively or literally over an unusual circumstance or over a fictional character

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.

A weird boner is what some lame asses might call an “unusual attraction”. It’s that indescribable feeling when you are so attracted to someone even tho there is something slightly ~off~ about them. One might say that this weirdness makes it even hotter.