Is it normally that i am really good at remembering people’s starsigns?

I’m strangely good at remembering people’s starsigns. I’m also really good at remembering which date makes you which. Like people only have to tell me once and I’ll remember it for ages even if I haven’t seen them in a while or barely think about them. I can remember several at a time. People can practically ask me anyone on the spot we both know and I’d get it. Sometimes I am good at guessing people’s too.