Introduction: There is no scientific evidence for the mechanism of male squirting, although the term is common in mass media. Here, we describe the first recording of male squirting using color Doppler ultrasonography.
Case presentation: We recruited a 25-year-old male volunteer who was able to have male squirting. A transrectal ultrasound probe was inserted into the rectum and male squirting was observed following normal ejaculation. With penis stimulation for a further 20 s after ejaculation, translucent misty fluids with a creatine level similar to that of urine came from the extraurethral orifice for about 60 s. Color Doppler ultrasonography recorded strong contraction of the prostate and pelvic striated muscles just before male squirting, and then the stream went from the urinary bladder through the prostatic urethra.
Conclusion: In male squirting, urine in the bladder gushes out from the external urethral orifice due to strong contraction of the prostate and pelvic striated muscles.
Keywords: color Doppler ultrasonography; ejaculation; male squirting; pelvic striated muscles; prostate.
© 2018 The Authors. IJU Case Reports published by John Wiley & Sons Australia, Ltd on behalf of the Japanese Urological Association.