From the Latin dorsum (meaning back) and the Greek philia (meaning affinity), this word literally means having an affinity for backs. A dorsophile is someone who enjoys cutting a hole in someone's back and using that hole for sexual activities. Dorsophiles are usually male.
Ah, there's nothing like dorsophilia and the feel of hot, steamy blood gushing from someone's back onto your dick.
A teenage slut, so named after the Drosophila melanogaster, an extensively studied species of fruit fly the females of which commence sexual activity with countless males only 8-12 hours after hatching. A polite alternative to nymphomaniac.
Nurse: Doctor, Sally is here again for another month's worth of Pill prescription.
Doctor: Oh, that little nymp..., er, drosophiliac! Show her in.