why is it so easy to lose all sense of responsibility and act like a child around really tall or big people?
Because you have daddy issues.
>>7855822
Dubs of truth
>>7855822
Partially this.
Also because we use our maturity because we become more aware of our abilities to harm others. The very large seem harder to harm so we let go more easily if we are not threatened by them.
Same reason people easily boss around children but not adults. They're less intimidating, or in your case more.