Neurological similarity: Most male orgasms result from stimulation of the penis. Most female orgasms result from stimulation of the homologous organ, the clitoris.

Anatomical difference: Standard sexual intercourse stimulates the penis very effectively, but stimulates the clitoris only moderately.

In a non-iterated interaction, the male partner has less incentive to perform activities likely to result in female orgasm. No brain difference is required to explain this effect.