Most beginners start and stop at their Sun sign, which describes core identity — how you show up, broadly, to the world. It's a fine starting point and a poor tool for understanding attraction, because attraction isn't run by your Sun. It's run by Venus.
Venus governs what you're drawn to, how you show affection, and what you find beautiful or comfortable in another person. Two people with identical Sun signs can have wildly different "types" because their Venus placements differ — one might be pulled toward stability and routine, the other toward intensity and unpredictability, regardless of what their Sun says about their general personality.
If you've ever wondered why you keep dating a "type" that doesn't obviously match your public personality, check Venus before you check anything else. It's a faster, more specific answer than most people expect, and it's the placement Unfate leans on hardest when reading the Chemistry fate between two people.