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The excitement phase (also known as the arousal phase or initial excitement phase) is the first stage of the human sexual response cycle, which occurs as a result of physical or mental erotic stimuli, such as kissing, making out, fantasizing or viewing erotic images, that leads to sexual arousal.
Oxytocin is a peptide hormone and neuropeptide normally produced in the hypothalamus and released by the posterior pituitary. [4] Present in animals since early stages of evolution, in humans it plays roles in behavior that include social bonding, love, reproduction, childbirth, and the period after childbirth.
Normally, humans feel pleasure from an orgasm; upon reaching a climax, chemicals are released in the brain, and motor signals are activated that will cause quick cycles of muscle contraction in the corresponding areas of both males and females. Sometimes these signals can cause other involuntary muscle contractions, such as body movements and ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 21 February 2025. Physiological and psychological changes in preparation for sexual intercourse "Turn-on" redirects here. For other uses, see Turn On. Martin van Maële's print Francion 15 Sexual arousal (also known as sexual excitement) describes the physiological and psychological responses in ...
The sensory fibers stimulate the motor fibers of the genital branch of the genitofemoral nerve (also at spinal level L1), which provides innervation to the cremaster muscles causing the contraction of the muscle and elevation of the testes. This causes the cremaster muscle on the same side to rapidly contract, raising the testicle. [6]
An erection (clinically: penile erection or penile tumescence) is a physiological phenomenon in which the penis becomes firm, engorged, and enlarged. Penile erection is the result of a complex interaction of psychological, neural, vascular, and endocrine factors, and is often associated with sexual arousal, sexual attraction or libido, although erections can also be spontaneous.
Life Extension shares 21 science-backed tips to help you establish a wellness-focused lifestyle and keep you in top-notch health as the years bring experience, wisdom, and other distinguishing traits.
The oxytocin receptor, also known as OXTR, is a protein which functions as receptor for the hormone and neurotransmitter oxytocin. [4] [5] In humans, the oxytocin receptor is encoded by the OXTR gene [6] [7] which has been localized to human chromosome 3p25. [8] Evolutionary tree of the oxytocin, vasotocin, mesotocin and isotocin receptors and ...