1- Erectile Dysfunction (ED): The persistent or recurrent inability to attain and maintain an erection sufficient to permit satisfactory sexual performance.

2- Premature Ejaculation: Ejaculation that always or nearly always occurs prior to or within about one minute of vaginal penetration (lifelong PE) or a clinically significant and bothersome reduction in latency time, often to about three minutes or less (acquired PE).

3- Delayed Ejaculation: Marked delay in ejaculation or marked infrequency or absence of ejaculation on almost all or all occasions (75-100% of the times) of partnered sexual activity without the individual desiring delay persisting for at least 6 months and causing significant distress to the individual.

4- Peyronie’s Disease (PD) is a symptomatic disorder characterized by a constellation of penile symptoms and signs, such as penile pain, curvature, shortening, narrowing, hinge deformity, and palpable plaque with subsequent ED.

5- Priapism is a persistent penile erection for more than four hours and not related to sexual stimulation or relieved by ejaculation. Priapism carries high risk of structural damage to the cavernosal tissue which may lead to permanent ED.

4- Anejaculation: The complete absence of ejaculation either antegrade or retrograde. Caused by failed seminal emission from the seminal vesicles, prostate, and ejaculatory ducts into the urethra. In true anejaculation, there is normal orgasmic sensation and is always associated with central or peripheral nervous system dysfunction or with drugs.

5- Painful Ejaculation: is a condition in which the patient may feel variable degrees of pain during or after ejaculation involving the penis, scrotum, and perineum.

6- Haemospermia: is the presence of blood in the seminal fluid ejaculate. The condition causes anxiety and may indicate underlying pathology in many cases.