Guys: What is something (feminine-ish) you do that you wouldn't want you male friends to know?

Because you would feel slightly embarrassed if they knew.
Because you know they would go: You sissy, plucking your brows is really a girls thing…
It can be in the body hygiene department, clothing, behaviour, etc.

I lift my pinky finger while drinking tea or coffee, involuntarily, but i do, and whenever I notice it I put it down, hoping nobody saw it and make a remark about it.

Girls: If you can relate, with something quite masculine, that likewise you would feel awkward if your female friends would know, be my guest and jump in.