John Mayer thanked his manager for teaching him about philanthropy and other acts of giving, including how it’s customary to send a bottle of wine to a woman after she’s gone through childbirth. At Monday’s VH1 Save the Music Foundation gala at Cipriani Wall Street, the guitarist told the crowd that when the manager once told him a woman “just gave birth to a child . . . vaginally,” he replied, “Now I get it. So now I send bottles of wine.” Mayer was honored along with John Legend, Julie Andrews and the ASCAP Foundation for their work promoting the arts in public schools. Mayer’s quip made Andrews’ table crack up with laughter.