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This girl tried several mascara brands to know which one left the best black streaks. Let me know if you have any experience with this.
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My wife went through a phase where she wanted me to have a mascara-streaked face, so I played around with a few brands. I found that theater face paint makes the best streaks most easily.
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Wow, I find it quite amusing that your wife is not into tears, yet, she asked you to have black streaks. I can only guess you must haved looked beautiful with several tear streaks on your face.