Meat Loaf: What exactly is it that the singer would not do for love?

So What Exactly Did Meat Loaf Mean When He Sang ‘I Won’t Do That’ On I'd Do Anything For Love?""HuffPost UKThe Story of... 'I'd Do Anything for Love (But I Won't Do That)' by Meat Loaf""Smooth RadioTrue meaning behind Meat Loaf’s song I’d Do Any