Not directly related to Santa Claus, but when I first heard of Cupid from classical mythology, I immediately thought of Cupid, one of Santa's reindeer. I figured they must be one and the same, since they're both mythological figures who can fly. When asked how this is possible, I explained that Cupid is an angel the rest of the year, but transforms himself into a reindeer at Christmastime. The other reindeer can do this too, but they tend to keep on the down-low because they're shy.
A childhood belief about father christmas

others believed things like this
- I didn't know Reindeer existed, I thought they were just christmas animals for storiesAnon
- For the longest time I thought that Rudolph the Red-Nosed Reindeer had a very "chinese" nose...Anon
- i used to bielieve if you get hit
in the nose you will turn into
rudolph the rednose reindeer— kurt santana - I used to believe reindeer made it rain because for many years it rained on christmas eve night.Anon
- I believed that Reindeer loved popcorn, and so I would cook a bag and scatter it on the porch.— Popcornsanta
- I used to believe that the "real" Santa Claus was at Macy's in New York City. All the rest were fakes. — Marcia