Family sexual relationship between sisters
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Intercourse is the reproductive relationship that takes place between a brother and his sister,
in which the male organ is inserted into the female reproductive system,
and if sexual intercourse is completed, the sperm will pass from the male body to the female,
and fertilization of the female egg can occur, which may result in pregnancy.
Intercourse between sisters goes through four stages called the sexual response cycle: These stages include the following:
Stage of sexual desire: This stage can last from a few minutes to several hours, during which some changes occur in the body, namely:
Increased muscle tension.
accelerated heart rate.
Increased breathing rate.
Skin flushing and redness.
man’s penis erection
Vaginal lubrication may begin.
The woman’s breasts become full, and the walls of the vagina begin to swell.
The man’s testicles swell, his scrotum narrows, and he begins to secrete a lubricating fluid.
The stage of sexual arousal: It is the stage of sexual foreplay between sisters, which helps in increasing sexual arousal.
In this stage, the changes that began in the first stage intensify, and the changes are as follows:
The vagina continues to swell due to increased blood flow, and the vaginal walls may become darker than normal.
Increase the sensitivity of a woman’s clitoris.
Respiration, heart rate, and blood pressure continue to increase.
Muscle spasms may begin in the feet, face, and hands.
Muscle tension increases.
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Orgasm stage: This stage is the peak of the sexual response cycle, and it is the shortest stage,
and it lasts for a few seconds most of the time. General characteristics of this stage include:
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