Pulsion (2014)

A horny hot woman who can achieve orgasm only through masturbation and never while having sex with someone decides to visit a sex therapist and seek help. He and his female assistant are organizing an experimental group sex therapy session in a villa for a couple of days, so she joins them. The group consists of his other patients with similar sex-related issues that range from asexuality and nymphomania to inability to achieve orgasm with the spouse, unless the spouse is having sex with someone else as well at the same time..