 The album opens with " I 'd Do Anything for Love ( But I Won 't Do That ) " , a marathon twelve @-@ minute opus which was edited for single release in some countries . The track begins with a guitar played to sound like a revving motorcycle , a reference to Todd Rundgren 's contribution in the middle of " Bat Out of Hell " . Each verse comprises two things that he would do for love , followed by one thing that he would not do . It is that latter parts of each chorus that is the " that " of the title . However , some people misunderstand the lyrics , claiming that the singer never identifies what the " that " is that he is unwilling to do , a confusion that Steinman predicted during production . The song combines stadium rock and ballad for much of its twelve minutes . However , near the end of the song , a female vocalist is introduced . Credited in the liner notes as Mrs. Loud , this part was sung by Lorraine Crosby . 
