What is the Vee-String Menstrual Function?

Throughout the years I have been asked this question many times.  So I thought I'd try to explain it here in a bit more detail. The Menstrual Function on the Sheath Vee-String, Masturbator with Sheath Vee-String and Sheath with Urinating Bladder Vee-String is simply a latex pouch on the side of the tube.  There's a [...]