Answer to Question 1
Ejaculation is the physiological process whereby the seminal fluid, or semen, containing the sperm is forcefully ejected from the penis. This is typically accompanied by the pleasurable sensation of orgasm.
Answer to Question 2
First, the skin overlying the scrotum contains many sweat glands and sweats freely, which cools the testicles when they become too warm. second, the cremaster muscle of the scrotum contracts and expands: When the testicles become too cool, they are drawn closer to the body to increase their temperature; when they become too warm, they are lowered away from the body to reduce their temperature.