When a man is fully inserted into a females vagina and does nothing. Only after may the female begin her Kegels exercise. The female will flex her vagina at an extremely high rate, forcing the male incumbent to ejaculate "Like a Motha Fucka" so to speak. Thus Kegels Sex.
an exercise used to keep the pelvic floor in good working condition to maximise the enjoyment of an aging woman's intimate encounters...to ensure a good grip even at the most advanced of ages.