Contrast is a most seductive trait.
Displaying it shows a woman that you are a unique, complex, and sexy human being. Women don't want a man that they can "figure out". They want someone who is a mystery, someone exciting.
If you are a badass, soften it up a little bit. Throw some pink into your outfit. Maybe a pinky ring. Get a little romantic.
If you are conservative, start swearing. Spice up the clothing. Scream "Fuck the world!"
You will drive women crazy.
You should add a warning though, if you really aim to have contrasts you risk coming off as incongruent.
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