If you want less beard hair or body hair in a particular area, you can mix peppermint oil with water at a roughly 1/40 ratio and apply it to that area. In 3 to 4 months the hair growth will start getting sparse.
If you add some lavendar to that concoction (it has been shown to block the human androgen receptor, and stimulate the human estrogen receptor) the effect will probably be magnified.