My vocabulary list of sexual body parts is limited. I rejoiced when 'penis' became an acceptable. I've studied the entire fine-print poster of George Carlin's dirty words, but many of his phrases feel foreign to me, like they'd need to be explained. This could be due to my generational upbringing and marrying when I was nineteen. I must not have had a broad enough range of experiences.
I dislike repetitive use of the word 'cock' in modern erotica. For some reason, I feel that word belongs as an euphemism in historical romance, i.e., "And his cock crowed."
Half of my WIP is set in 1490's Brittany. I researched the Breton words for penis and vagina, and used them in love scenes when in my past-life hero's POV. This expanded my vocabulary and, I hope, added some historical realism.
All in all, I want to craft love scenes where sexual tension is built up through dialogue and intimate foreplay. When coupling finally occurs, I hope my reader is so engaged, she can 'feel' the thrusts and moans without needing a tutorial in the act of sex. I'm more interested in how the H/H relationship intensifies after each coupling.