Should my friend listen to me about learning to hand break/E-break turn?

My friend is desperate to learn how to Hand break (some people say e-break) turn. I tought my brother how to do it aswell as a J turn and peel out aswell as some other cool tricks in a quiet rarely used car park using my own car. However my mate keeps telling me he wants me to teach him but wont because i currently dont old a licence. Im just saying what is the difference if we are not on public roads? So please stop him whining and let me know what you think.