Okay, so, first, none of us are biologically masculine or feminine, because those aren't biological concepts, they're social ones.
People who are biologically male tend to be assigned masculinity, and same with females and femininity. And just because something is socially constructed doesn't mean it is not important — as a million memes will tell you, we live in a society.
I think the heart of the issue is who assigned the gender roles: The gender role you want to assign me isn't important; the gender role I assign myself IS.
I once sneezed so hard while lying down that my sock flew off.
Like you, I use a handkerchief. If I'm wearing a T, I might instead lift up the collar and sneeze down the front of my shirt. More gross for me but more hygienic for everyone else around. The third option is to drop into a crouch and sneeze into my elbow between my knees, funnelling it towards the floor.
I would rather do one big sneeze than lots of little sneezes, though.