Disagree with that part.
Although its a bitter pill to swallow; it has been proven by gynaecologists, evolutionary biologists that women loses a significantly large amount of natural tightness due to child birth.
In fact there are diagrams on the Internet and text books that show the slow regression of tightness from factors such as a female losing her virginity, extended periods of intercourse, intercourse with a "well endowed" Male (such as me) and child birth- hence why couples sex lives are affected afterwards.
True- the entrance and vaginal muscles can be re-tightened with pelvic floor exercises but a woman loses a lot of natural elasity that can only be rediscovered in younger females (hence why Male are more likely to cheat abandon their partners after courtship).
That's a load of tosh. Muscle tone can decrease with age and childbirth, but not through lots of sex or through sex with well endowed men. Perhaps you can post a link to these pictures and/or state which books this information can be found in.http://www.sarilocker.com/advice/qa.php?id=282
Dear Dr. Locker: Does a woman's vagina get looser if she has sex with a man with a large penis? My girlfriend feels much looser than my ex-girlfriend. Has she only been with well-hung men?
Answer from Dr. Locker
The tightness of a woman’s vagina is not related to the size of the penises that have been inside it. It’s a myth that a woman’s vagina becomes permanently stretched out from having sex with a man with a large penis. After each sexual encounter, the vagina contracts to its original size, and it has no lasting stretching from a large penis. The only way that a woman’s vagina may stretch significantly is after she has a baby, and as you know a baby is much larger than any human penis.
A woman's tightness is often related to the muscle tone of the muscles in her pelvic region. "PC" (pubococcygeal) muscles that control the flow of urine can be more toned in some women, causing their vaginal walls to feel tighter. These muscles can be strengthened if a woman performs Kegel exercises. However, many women are not successful, at making their PC muscles tighter, because it takes daily sets of hundreds of reps of Kegels to make a difference.
However, the tightness or looseness of a woman's vagina is not only about her muscles. It is highly related to how aroused a woman is -- or if she is even interested in having sex at all. When a woman’s vagina feels very tight during sex, often it is either dry because she is not aroused, or her muscles are contracting because she is anxious or maybe not interested in sex. If your girlfriend’s vagina feels loose (and she’s not a mom), then that could mean that she is easily turned-on and very interested in having sex with you. When a woman is highly aroused, her vagina lubricates, then lengthens and expands in order to allow a penis to penetrate easily. Also, when a woman loves sex, she is usually more comfortable with it, and her muscles relax easily and she becomes aroused more fully and thus highly lubricated, which could also be why your girlfriend feels looser to you. This is essentially all good news: she is turned on by you, and she’s into sex!