It’s no big deal jerking off to blow off some steam. But is it a bad thing to wank your willy any which way?

According to these findings published online in the Journal of Sexual Medicine, unusual masturbation techniques could have adverse effects on sexual intercourse. In the study, researchers found four cases of unusual masturbation practices (defined in the study as techniques unlike standard intercourse not able to be recreated by a partner’s hand, mouth or vagina) which led to abnormal sexual functioning in partnered sexual activities. The men in the study had sexual dysfunctions such as inability to ejaculate, abnormally low libido, ED and ejaculatory anhedonia (inability to gain pleasure from orgasm). Through questioning participants about the way they masturbate, researchers note that these “abnormal” or unusual masturbation practices include arousal by only illegal hardcore porn, masturbation using a vacuum’s suction, needing the force of Jazuzzi jets water to orgasm and another habitually masturbated with a flaccid penis.

Patients regained normal sexual functioning during partnered sex after extended sexual therapy that included changing masturbation practices to ones that more closely resembles simulated intercouse and discontuing all extraneous devices.