It's bad to do someone's homework for them.
Dexter and his friend Bo are in the same Calculus class, with Bo struggling and Dexter doing well.
Dexter wants Bo to get a good grade on his next homework assignment.
Dexter tutors Bo on the homework material before Bo completes the assignment himself.
Dexter gives Bo the answers to the homework assignment before Bo turns it in.
Bo understands the material covered by his homework and ends up getting a good grade on his next test.
Bo does not learn the material covered by his homework and ends up flunking his next test.