The gift of the Magi

“Don't make any mistake, Dell,” he said,
“about me. I don't think there's anything in the way of a hair cut or a shave or a shampoo that could make me like my girl any less.
But if you'll unwrap that package, you may see why you had me going a while at first.”
White fingers and nimble tore at the string and paper.

there's anything～that could make me like my girl any less. : どんな風に～しようとも僕が自分の奥さんを少しでも嫌いになるわけはないよ。
unwrap : ～の包みを開ける
why you had me going : なぜ君が僕のことをあぜんとさせてしまったのか。
white fingers and nimble : white and nimble fingers 白くて素早く動く指
tore : tearの過去形