Sounds indicating reception of pleasurable sexual stimuli are occurring on both ends. The male partner’s penis is being placed inside of the vagina, past the vulva, by the thrusting of the male. The sexual stimulation is causing the male to climax, sending a fluid containing spermatozoa to move through the urethra of the male, out through the meatus and into the female genitalia, putting the spermatozoa into the female’s body. The sperm that reaches the egg fertilizes it, causing it to eventually become a fetus that develops and, nine months later, is born, pushed by contractions, as the offspring of the female and the male. The child grows and develops in ways too complex and numerous to list. It eventually marries and proceeds to reproduce soon after, repeating this cycle again.