In the spirit of Valentine's Day and ohmygawdWTF I present... jade eggs. As a male of the species, burdened as I am by my Y chromosome, I do not pretend to understand the subtleties of vaginal exercise. I take it at face value that training these important muscles is beneficial.
So all I can do is quote Kim Anami, "holistic sex and relationship coach," on the benefits of "vaginal kung fu" which involves, and I am not making this up, lifting things with her vagina. I can hear your skepticism, so I provide as a public service this link to her Instagram account for actual proof of said lifting.
Ms. Anami uses the eggs for practical tasks that may be familiar to all you gearfloggers out there: carrying her surfboard, lunch and picking up found objects in third world countries because... I really don't know because.
We'll just close with her parting words of vaginal wisdom: "These things are possible for every woman: ping pong tricks, multiple orgasms, ejaculate that shoots across the room, and insane, life-changing pleasure."