en.wikipedia: Charles R. McCarron

Charles R. McCarron (1891–1919) was a United States Tin Pan Alley composer and lyricist. McCarron is credited on such numbers as Fido Is a Hot Dog Now, Your Lips Are No Man's Land But Mine, Our Country's In It Now, We've Got to Win It Now, and "Eve Wasn't Modest 'till She Ate that Apple". He collaborated with other composers including Albert Von Tilzer, Carey Morgan, and Chris Smith.