Male contraceptives are traditionally split into three groups: barrier, medical and surgical contraceptives. Barrier — condoms, medical — hormonal drugs (male “birth control” pills or injections), surgical — vasectomy, ligation of the vas deferens.
Masturbation is a common and normal sexual activity, but many people still feel uncomfortable talking about it or even ashamed about doing it. Unfortunately, old stigmas and myths/misinformation continue to surround the practice of masturbation which, in reality, is a healthy, free way to experience sexual pleasure.
ED (colloquially "impotence", "dud") may not clearly reveal itself, but there are indicators that could help to recognize it long before it happens.
Scientists have found proof that the style of men’s underwear influences sperm quality. The tight underwear will lower the concentration of spermatozoids in the sperm and make them less mobile.