Some people have the ability to make everything they say sound just a little bit flirtatious, while others are happy to stay in their shells.
"Super-friendly Aquarius doesn't realize they're flirting because they just think they're being friendly," she says.
"More Captain Caveman than Jane Austen, there's nothing subtle about Sagittarius' approach to flirting," says Williamson.
Donelson adds, "If a Leo senses they might have the opportunity to be admired, chances are they'll turn up the charm."
"Passionate, impulsive Aries doesn't know how to hold back when they like someone," says Williamson.
Geminis are known for being social butterflies, which can translate into a certain flirtatiousness with everyone around them.
"They usually see the best in everyone, but because they rely on others to give them a sense of their own identity.