Ejaculation & Premature Ejaculation

Physiology of Ejaculation

Ejaculation refers to the expulsion of semen through the male urethra and proceeds in two clearly distinct phases. During the emission phase, sperm from the epididymis, along with secretions from the seminal vesicles, prostate, and bulbourethral glands, are transported into the posterior urethra by contraction of the smooth muscle; at the same time, a sphincter mechanism closes off the bladder neck to prevent retrograde ejaculation. During the expulsion phase, rhythmic contractions of the pelvic floor muscles as well as the ischiocavernosus and bulbospongiosus muscles forcefully expel the ejaculate through the urethra.

This process is coordinated by the ejaculation center in the lumbar spinal cord (L1/L2), which is activated by afferent signals from the genitals via the pudendal nerve. The sympathetic nervous system governs the emission phase, while the expulsion phase is predominantly mediated somatically via the pudendal nerve. Ejaculation and orgasm, though closely coupled in time, are neurophysiologically distinct processes and can, in exceptional cases, even become dissociated — for example after certain spinal cord injuries or medical interventions.

Ejaculation Disorders

Ejaculation disorders are common and can cause considerable psychological distress. Retrograde ejaculation, in which semen flows backward into the bladder instead of outward, results from insufficient closure of the bladder neck; it frequently occurs after prostate surgery, in diabetes mellitus with autonomic neuropathy, or as a medication side effect, and leads to a "dry" orgasm. Delayed or absent ejaculation can have an organic cause — such as neurological disease or medication (particularly SSRIs and antipsychotics) — or a psychological one. Painful sensations associated with ejaculation or orgasm (dysejaculation) can point to inflammation of the prostate, seminal vesicles, or urethra.

Premature Ejaculation (Ejaculatio Praecox)

Premature ejaculation is the most common male sexual dysfunction; prevalence estimates vary between 20 and 30 percent depending on the definition and survey method used. The current definition from the International Society for Sexual Medicine (ISSM) describes it as ejaculation that always or nearly always occurs within about one minute of penetration (lifelong form), or that is shorter than desired and experienced as a loss of control, combined with negative consequences such as distress, frustration, or relationship problems.

A distinction is made between the lifelong (primary) and acquired (secondary) forms. Lifelong ejaculatio praecox begins with a man's first sexual experience and has a strong neurobiological component: studies show that affected men have a genetically determined, faster ejaculatory reflex and altered serotonin signaling. Since serotonin has an inhibitory effect on ejaculation, a relative serotonin deficit within the relevant reflex pathway is neurobiologically plausible. The acquired form develops after a period of normal sexual function and is often associated with psychological factors — performance anxiety, relationship conflict, stress — or with physical conditions such as prostatitis or hyperthyroidism.

Treatment Options

The range of treatment options is broad and depends on the form and severity. Behavioral techniques — in particular the stop-start method developed by Semans and the squeeze technique developed by Masters and Johnson — allow for conscious control over the ejaculatory reflex through targeted exercises; they are especially effective for the acquired form and in cases with a psychological component. Pharmacologically, selective serotonin reuptake inhibitors (SSRIs) are the first-line medical therapy; dapoxetine is the only SSRI approved specifically for this indication and, owing to its short half-life, can be taken on an as-needed basis, while other SSRIs are used off-label as a daily long-term medication. Topically applied anesthetics — creams, sprays, or coated condoms containing lidocaine or benzocaine — reduce glans sensitivity and thereby prolong ejaculatory latency; they are effective but can affect sensation for both partners. Sex therapy and couples counseling are particularly useful where there is a psychogenic component or relationship strain and can effectively complement pharmacological approaches.

Premature ejaculation is well treatable; an open conversation with a urologist, andrologist, or sex therapist is the first and most important step. Despite considerable distress, many affected men wait too long before seeking help — yet clinical experience shows that even a few targeted measures can substantially improve quality of life.