I don't generally look up the Saints on their feast days, but I noticed the name Damian, and since I have a good friend named Damian (and an incredibly faithful Democrat!) I looked up these two, who share the day.
Turns out they were brothers and doctors, martyrs in the third century. Check out the excerpt below the link -
Sir William Hamilton (1730–1803) reported that, among the wax representations of body parts then presented as offerings to the two doctor saints at Isernia, near Naples, on their feast day, those of the penis were the most common. They were in fact venerated as patrons of "young girls anxious for a husband, and married women desirous of children."
Yikes! If you hit the link, you'll find many other interesting things about the two of them.