Inspired by this thread on twitter which had some good vagina info. It's amazing how many people know so little about the female anatomy so here are some more interesting facts!
- The walls are very elastic to allow it to stretch and then shrink back again after vaginal childbirth delivery. It does not require manual dilation to keep it open or maintain its shape, unless as a result of side effects from other medical procedures (such as some female-occurring cancer treatments).
- It is self-cleaning and has a naturally acidic environment until the time around ovulation, when the PH changes to make it more accommodating for sperm, to promote fertilisation. It does not require daily artificial cleaning products or lubricant to keep it healthy.
- The walls of the vagina (the vaginal vault) are made up of two layers of muscle tissue, which allow for expansion and contraction - which can often be felt as 'ridges', which lessen with age or post- vaginal delivery childbirth. The walls contain no glands.
Feel free to add your own facts 