Building on previous work that identified different

types of orgasm in women (King, Belsky, Mah, & Binik,

2011), the goal of the present study was to extend such typological

work and determine whether female orgasmic variability

tracked potentially evolutionarily salient sexual partner

characteristics (e.g., those displaying possibleimmune-system

compatibility). A total of 265 females completed an Internet

survey about their orgasmic experience—achieved either with

partners or alone. For partnered orgasms, they also provided

details of partner characteristics and sexual behaviors. Latent

class analysis revealed two orgasm types which were meaningfully

distinguishable in terms of sensations and location—

either centered on the surface of genitalia or deep inside. Deep

orgasms were associated with internal sensations consistent

with proposed functions of female orgasm in terms of differential

sperm insuck. Such orgasms were associated with

partners who were perceived as considerate, dominant, with a

noticeably attractive smell, and as providing firm penetration.

However, some hypothesized reproductively significant partner

characteristics were not differentially associated with deep

orgasms (i.e., muscularity, aggression, masculinity). Results

were discussed and future research directions outlined. In particular,

it is suggested that sexual passion between partners is a

non-accidental component of sexual functioning and that this

has too frequently been missing in sex research involving humans.

Direct physiological measures of the results of female

orgasm need to be undertaken.Additionally, the intriguing phenomenon

of female ejaculation deserves scientific attention.