Cupid Charities, d/b/a Cupid's Charity, is the 501(c)(3) non-profit organization behind Cupid's Undie Run, a 1-ish mile charity underwear run through 40 cities worldwide around Valentine's Day. Donations fund Neurofibromatosis (NF) research by way of the Children's Tumor Foundation, a Charity Navigator 4-star non-profit that is the world's leading research vehicle for NF research. NF is a debilitating genetic disorder that causes tumors to rapidly grow throughout the nervous system, usually manifesting itself during childhood and often leading to deafness, blindness, learning disabilities and severe chronic pain. NF affects roughly 1:3,000 births in the U.S. and is in desperate need of new discovery.