In consequence of changes of concentration in the blood of the various internal secretions, tensions, movements and tumescences, as well as relaxations, inhibitions and detumescences, occur throughout the vegetative systemthe blood vessels, the viscera, the nerves and the muscles.

sex instinct, sex drive, libido, lust, concupiscence; hots, horns [Coll.]; arousal, heat, rut, estrus, oestrus; tumescence; erection, hard-on, boner. masturbation, self-gratification, autoeroticism, onanism, self- abuse. orgasm, climax, ejaculation. sexiness, attractiveness; sensuality, voluptuousness.