The non-phallic partner Toy FOUR has been specially developed for circlusion without a harness and offers stimulation for all participants. Wet For Her has developed this double-sided dildo for people with vaginas.
How does it work?
One inserts the "pear", the short part, into the vagina and with a bit of training, the pelvic floor holds it in place. The Four double comes with a small vibrator that has 5 speeds and is rechargeable via USB. It offers rather gentle vibrations and is also compatible with a harness so that the "fingers" do not slip out, depending on the pelvic floor thickness.
Made by women.