Femulating is easier today.
One reason, according to a study mentioned in The Huffington Post, is that women are not plucking and arching their eyebrows to the extent that they had in the past, thus relieving femulators from following suit.
I held off plucking and arching my eyebrows for a long time because I thought that they would give me away. Instead of plucking, I trimmed my eyebrow to neaten the unruly mess.
After trimming, no one noticed and I assumed my eyeglasses hid my handiwork. (I always wear eyeglasses in boy mode, but never in girl mode unless I am driving.)
Since no one noticed, I began plucking my eyebrows to thin them and arch them.
When my eyebrows approximated those of actress Keira Knightley (see photo), I figured if they were feminine enough for Keira, then they were feminine enough for me. So now I just pluck and trim to maintain my Keira eyebrows.