s.o. absolutely loves doing sth. , it is his favorite thing to do: X-a хлебом не корми (, только дай делать Y) = nothing pleases X so much (as doing Y)
therefe nothing X likes better (than doing Y). (Курчаев:) Его хлебом не корми, только приди совета попроси (Островский 9). (К.:) Nothing pleases him so much as having his advice sought (9b).