No need to cloud fantasy with the practicalities of reproduction. There are many legends of creatures, gods, beings with clear genders being spawned from rocks, foreheads, and various other weird sources. Perhaps these dwarves did it the old fashioned way and got cursed/blessed into being tubers at a later point.
A pair of ladies lace gloves, that once donned, give the wearer a quick, and very tidy manicure. Nails are properly trimmed, sanded, and come out with either 'French' (insert game name) style nails, or their nails colored in the manner desired by the wearer. Useful for removing hangnails, and other cosmetic problems