photo via https://en.wikipedia.org/wiki/Rudolph_the_Red-Nosed_Reindeer through the creative commons license
reindeer's are actually women
Most of Santa’s reindeer have male-sounding names, such as Blitzen, Comet, and Cupid. However, male reindeers shed their antlers around Christmas, so the reindeer pulling Santa’s sleigh are likely not male, but female.