A stallion is a male horse that has not been gelded castrated. Stallions follow the conformation and phenotype of their breedbut within that standard, the presence of hormones such as testosterone may give stallions a thicker, "cresty" neck, as well as a somewhat more muscular physique as compared to female horses, known as maresand castrated males, called geldings. Temperament varies widely based on geneticsand trainingbut because of their instincts as herd animals, they may be prone to aggressive behavior, particularly toward other stallions, and thus require careful management by knowledgeable handlers.
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The start of adolescence is often closely tied to puberty. Girls become women their breasts start showing, they start growing hair and begin to menstruate, etc. Puberty is also a time when we start becoming more keenly interested in sexuality.
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Back to Sexual health. You have grown up together and shared many experiences, but how well do you really know your penis? If the penis is violently twisted when erect, it can break.
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When the blood vessels of the corpora cavernosa relax and open up, blood rushes in through the cavernosus arteries to fill them. The blood then gets trapped under high pressure, creating an erection. Sexual stimulation and friction provide the impulses that are delivered to the spinal cord and into the brain. Ejaculation is a reflex action controlled by the central nervous system.
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