Y.M. Oh, dear, it's all so disgusting. And so true. He does seven-tenths of the act because it gratifies HIM to gratify his mother. Throw the bulk of advantage the other way and the good boy would not do the act. He MUST obey the iron law.
None can escape it.
You needn't mention it, it is a waste of time. It is no matter about the bad boy's act. Whatever it was, he had a spirit-contenting reason for it. Otherwise you have been misinformed, and he didn't do it. It is very exasperating.