If a guy is a smart-ass and playfully teases women, is that taken as flirting?

When he teases, and it's playful and the girl doesn't get defensive but laughs and smiles...is that taken as him flirting? Because that's what I do, and if it's too subtle they won't realize it's flirting. So am I doing it right?
If a guy is a smart-ass and playfully teases women, is that taken as flirting?
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