Ain't No Other Man - Composition

Composition

"It's pretty much about how her husband has stolen her from looking at anybody else, 'cause he's the one who did it for her". "And the record's real sassy, like an old Aretha 'Respect' kind of attitude. It's real raw and has breakbeats in it and everything, but it's chopped up and totally tailored to what she was trying to do collaborating with me. The song is real, real fast, which is definitely different for me, 'cause I don't do real fast tempo," Premier said. "This thing is like 130 beats per minute, but it still sounds like hip-hop/ Christina."

—DJ Premier, the producers of the track, talking about the song.

"Ain't No Other Man" is a funk song written in the key of F♯ minor. It is written in common time and moves at a moderately fast tempo of 128 bpm. Most of the lines end in a sample of Dave Cortez & The Moon People's 1968 song "Happy Soul". The song also samples The Soul Seven's 1969 song "The Cissy's Thang". Aguilera's vocal range spans nearly two octaves in the song, from G♯₃ to F♯₅.

Lyrically, the song is about how someone is the only one for the other. It features threats that mingle with pledges of devotion: "So tell your mother, your brother.../Tell the others, your lovers/Better not be present tense/'Cause I want everyone to know that you are mine and no one else's."

The media has said that her former husband inspired the track, but Aguilera said that the song isn't a love song. "I got married since the last record, so lyrically, it's intertwined where I've been in real life." "It's not a 'love song,'. It's fun, it's upbeat, it's got a little bit of a twist in there, a little sass."

At the MTV Movie Awards Aguilera said the following about the song:

“

I wanted to make it light and easy for people to dance to and sing along to, so the whole song is based on feel-good elements of soul and blues and jazz. Lyrically, I just got married, so it's about someone in particular, but it's all about feeling good and not taking anything too seriously.

”