I couldn’t even begin to count the number of times I’ve been asked about my astrological sign. Nine out of every ten people I meet wants to know my sign, to get a glimpse of who I am and how well we’d get along. Of course, seven out of ten of them are shocked that I’m a Leo, and I feel the need to explain that my rising sign is Aquarius. To which they typically respond with an, “Ahhh…”

But when you’re trying to find out the chances of being compatible with a person who is to become a significa...