Vaginal orgasm is associated with less use of immature psychological defense mechanisms.
Women's partnered orgasm consistency is associated with greater duration of penile-vaginal intercourse but not of foreplay.
Anxious and avoidant attachment, vibrator use, anal sex, and impaired vaginal orgasm.
Slimness is associated with greater intercourse and lesser masturbation frequency.
Functional MRI of the brain during orgasm in women.
The post-orgasmic prolactin increase following intercourse is greater than following masturbation and suggests greater satiety