Psychology of sex - Total No. of Records in System :: 2032

THE BIOLOGY OF SEXmerely anatomical foundation. There are many naturalvariations in the shape and size of the hymen; variousaccidents (as well as virginal masturbation) may cause itsdisappearance; while it may occasionally persist after intercourse,even in prostitutes.Its rupture on the first act of intercourse isapt to causepain and discomfort. Occasionally its toughness causesthen bedifficulty in penetration. A slight incision maynecessary. Graduated pressure, as with the finger, whichmay be practiced by the woman herself, has also beenrecommended. Among some peoples the insertion of thefinger is practiced by mothers on their girl children froman early age, sometimes for hygienic reasons and sometimesto facilitate intercourse in future years. There maybe something to be said for this practice.In all animals, even those most nearly allied to Man,coitus iseffected by the male approaching the female posteriorly.In man, the normal method of male approachisanteriorly face to face the position of so-called Venusobversa. While, however, the Venus obversa may be regardedas the specifically human method of coitus, thereare modifications of it, and other more animal-like methodswhich have been adopted by various peoples asnationalcustoms, and which, therefore, come within thenormal range of variation. It is a mistake to regard themas vicious perversions.Now a new element comes in: muscular action. Withthe onset of muscular action, which is largely involuntary,even when it affects the voluntary muscles, detumescenceproper begins to take place. Hence full purposeful actionis, except by an effort, virtually abolished. We approachthe decisive moment when, under the influence of thestimulus applied to the penis by friction with the vagina,the tension of the seminal fluid poured into the urethra[21]