Key: Leigh-Anne , Jessy, Perrie, Jade , everyone

Does he tell you he loves u, when u least expect it, does he flutter your heart when he kisses your neck , no scientists, no biology,it obvious when he's holding me , it's only natural that I'm so affected ,

Oh, and my heart won't beat again, if I can't fell him in my veins,no need to question, I already know

It's in his DNA d-d-d-dna, it's in his DNA,and he just takes my breath away,b-b-b-breath, I feel it everyday
And that's what makes a man,not hard to understand
Perfect in every way,I see it in his face nothing more to say it's in his d-d-d-dna

It the blue in eyes that helps me see the future, fingerprints that leave me covered for days , yeah hey , yeah,now I don't have any first degree, but I know what he does to me , no need to work it out, it's so familiar, oh

And my heart won't beat again, if I can't feel him in my veins, no need to question I already know

It's in his DNA, d-d-d-dna it's in his DNA,and he just takes my breath away, b-b-b-breath away ,I feel it everyday day, and that's what makes a man,no need to understand, perfect in every way, I see it in his face
It's in his d-d-d-dna

It's all about his kiss, contaminates my lips , our energy connects, it's simple genetics, I'm the X to his Y, it's the colour of his eyes ,he can do no wrong,no he don't need to try, made from the best ,he passed all the tests got my heart beating fast, it's cardiac arrest
He's from a different strain that science can't explain, I guess this is how it's made in his d-d-d-dna

Woah woah oh , it in his DNA d-d-d-dna, it in his DNA,and he just takes my breath away, b-b-b-breath away, I feel it everyday, and that's what makes a man, what makes a man , not hard to understand ,to understand, perfect in every way , in every way , I see it in his face , in his face, nothing more to say, nothing more to say , it's in his D-D-D-DNA