I think this song says it's the way his significant other smells that intimately connects him to her.
It's not his sense of taste ("I sure like your bread [...] But how do I know if I love you?"), or even the smell of her soap ("When you come out clean from the shower..."), or the way she looks ("when the light in your house isn't on"), or talks ("I thought I heard movement but maybe I'm wrong"). Instead, he trusts "his nose to show [him] the way").
I think this song says it's the way his significant other smells that intimately connects him to her.
It's not his sense of taste ("I sure like your bread [...] But how do I know if I love you?"), or even the smell of her soap ("When you come out clean from the shower..."), or the way she looks ("when the light in your house isn't on"), or talks ("I thought I heard movement but maybe I'm wrong"). Instead, he trusts "his nose to show [him] the way").