Gentlemen plz hear this: the ONLY way for a bike to change direction is COUNTERSTEERING. Thats pure PHYSICS.. I dont care if you leaned tour body for 50 years, or whatever u have been doing for the last 3-4 decades: ITS WRONG. The number of years doesnt make it right. Science does
You only lean ur body when u are excessively speeding, and the leaning angle of ur bike is at its maximum, so u put ur body further away to lean more (ie: like the moto gp guys).
Otherwise, on normal street riding, ur body should be upright (if not counter-leaning ur bike if ur avoiding an obstacle). Staying upright keeps the balance of the bike when IT is leaning (not you)
Second thing is the front brakes. For those 'experienced' ones, the front brake is the ONLY brake that stops the bike. And YES, u CAN, and u SHOULD use it while turning. If ur afraid of using ur front brakes on turns/curves, that means u have no idea how to use the brakes at all: go practice trail breaking: its a technique that teaches u to properly to ride a bike.
The rear brake is only used for balancing the bike in slow manouvres, and it is used as a 20% help in emergency braking. You cant use the rear brakes while doing turns, it can kill you. (Especially if u find urself needing to stop in the middle of the turn).
Slowing down in curves is only done with the FRONT brakes, if used progressively and correctly. All those who say that the front brake is dangerous on curves, they have absolute no idea about what they are talking about.
Gentlemen: taking courses and practicing is NOT for beginners. Rossi and Marquez have 3-4 teachers, eventhough they're gods. Practicing makes ur muscles do the correct reflex in emergency situations: If a child crosses in front if u, and u need to go left (and u have 0.1 seconds to act), u might steer to the left as a reflex, and kill the child or urself, (instead of countersteering)(Leaning ur body to avoid the child will need 50 meters and 5 seconds, which is too late)
Please watch this crash: (watch the slow-mo part and notice the steering that killed the guy)
If u cant afford taking courses, u can watch hundreds of youtubers who teach u how to practice for free. U only need an empty space and 30min/week. It will save ur life one day. Motojitsu channel is a great example, Mcrider as well. They teach you how to practice swerving, emergency braking, trail braking, countersteering.. i.e all the basic stuff that save ur life.. and its free!!
Swerving video: