What's the noun for orgasmic? Here's the word you're looking for.
orgasm
(obsolete) A spasm or sudden contraction. [17th-19th c.]
A rush of sexual excitement; now specifically, the climax or peak of sexualpleasure, which occurs during sexual activity and which in males may include ejaculation and in females vaginal contractions. [from 18th c.]
“Hence, the aim of intercourse for a male was to give the female an orgasm while avoiding ejaculation.”
“Febris irritativa, or fever with strong pulse, consists of a previous torpor of the heart, arteries, and capillaries, and a succeeding orgasm of those vessels.”