Looks like you’re “putting up your dukes.” Like the sign for boxing, many sports signs are iconic.
Pretend that you’re steering a car.
Act like you’re putting food in your mouth.
Have you ever seen a cow being milked? That’s how you sign milk.
Think of when you walk through the shallow end of the pool and extend your arms out in front of you to clear the water.
If you’ve ever brushed your teeth with your finger, you made the sign for toothbrush and for brushing your teeth.