There are many body parts that you might not know have names! Many of them are excellent boggle words. Many of them should be used more often in erotica, rather than the tired old standards.
My newest favorite example:
Ala. The wing of the nostril (or naris – another good vocab word). Each has a wishbone of a muscle responsible for expanding and contracting the nostril, and each has an abundant blood supply and heavy enervation. Sensitive.
Ala. Start using it in everyday conversation. Impress your friends!