Generally, when a person thinks about sex and size, their mind likely wanders to the penis. However, people who are assigned female at birth may also be preoccupied with the size of their vaginas.

Numerous popular culture references and accounts suggest that a “tight” (but not too tight) vagina is desirable, while a “loose” vagina is not. Unfortunately, not only are these opinions subjective and vague, but they also ignore the overall health and function of a vagina, as well as create undue anxiety for some vagina owners who may worry that their vaginas are “too loose.”

Perhaps this is why there is an abundance of internet queries regarding vaginal size and whether having sex changes the size of a person’s vagina. Despite myths to the contrary, having sex does not change the size of person’s vagina, nor does it have a lasting impact on vaginal tension.

The following is a description of what actually happens to the vagina during sex. With sexual arousal, the pelvic floor muscles that surround the vagina slowly relax, opening the vagina to allow for penetration. This process can take a while, so foreplay is usually an important part of sex for many people with vaginas.

Before, during, and immediately after sex, the vagina is temporarily wider than usual. However, when sexual activity is complete, the elastic muscles around the vagina return to their original position and shape, and the size of the vagina is unaffected.

Although some individuals may feel that their vaginas are tighter or looser at different times, these sensations may be due to a number of factors that are unrelated to the true size of the vagina. For example, anxiety about sexual activity can lead to contracted, tense pelvic floor muscles, possibly making the vagina feel too tight for penetration.

Alternatively, certain sexual positions may result in the vagina feeling tighter or looser during sex for some individuals. Talking openly with a sexual partner about any anxiety, concerns, or sexual position preferences you have may help facilitate more enjoyable sex.

Lastly, it is possible that over time with advancing age or after childbirth, the pelvic floor muscles may weaken, leading to the vagina feeling looser. Pelvic floor physical therapy and pelvic floor muscle exercises such as Kegels can be effective treatment options, so talk to your health care provider about a referral to a specialist if this is a concern for you.

References:

• Braun, V., & Kitzinger, C. (2001). The perfectible vagina: Size matters. Culture, Health & Sexuality, 3(3), 263-277. https://doi.org/10.1080/13691050152484704