When it comes to Semen Retention there are a range of techniques that can be used either for structural results (long term) or for results “in the moment.”
Do mind that Semen Retention doesn’t mean one cannot (or shouldn’t) have an orgasm. In fact, one can still have a non-ejaculatory orgasm, typically a Full Body Orgasm, which is usually described as being more pleasurable than a penile orgasm.
Pelvic Floor Muscles Exercises (or alternatively pelvic floor massages) or Kegel Exercises can structurally strengthen the muscles near and around the bladder, prostate, and penis. By strengthening this area one can gain more control over erections, ejaculations, and/or Semen Retention.
Additional techniques for Semen Retention may include using penis desensitizers, the Frenulum Squeeze Technique (squeezing the head of the penis on the moment of ejaculation urge), the Stop-Start Technique (simply stopping on feeling ejaculation urge, pausing, and then restarting with thrusting or masturbation), sexual abstinence, the Perineum Press Technique (a Taoist Retrograde Ejaculation technique), breathing exercises, alternate sex positions, “slow sex,” Mudras and Bandhas, and a variety of Tantric and Taoist techniques.