So, I hope this Instructable will help you on your quest of learning how to thread eyebrows....
-Then tie the thread in a knot to make a loop.
-Twist the fingers on one hand to make an 'X'.
-Twist your fingers a few more times in the same direction (about 4 twists should be enough).
-Keep the fingers of one hand pinched together while you open the fingers of the other hand. This will slide the twisted part of the thread over. This movement is how the thread grips the hair and pulls it out. (kind of like when you rub a rubber band over your arm and it pulls out your hair...actually it hurts like that too when you are removing multiple hairs such as your upper lip).
So, place one hand above your brow and the other below. The hand that will be used to move the twisted part of the thread will be the hand below the brows.
-Place the hair you want to pull out in the 'V' part of the thread.
-Open fingers on hand below brow to move the twist over the hair. The hair gets caught in the twist and THUS will be pulled out!!! Do this movement fast. It will work easier and be painless.
***MAKE SURE WHEN YOU DO THIS MOVEMENT YOU DON'T HAVE THE THREAD NEAR HAIR. It could lead to accidently pulling hair out.***
-When threading near hair you don't want removed, you can use the thread to push the hair out of the way. This will allow easier access to the one hair you want removed.
I suggest practicing the movements first. Alternating between opening one hand then the other.
I also suggest practicing on your(or your boyfriend's) leg hair before attempting the brow. It is hard to control the thread in the beginning. If you don't practice first, you may end up with very oddly shaped eyebrows.