Apparently this is what went down in a brand new interview;
The boys said their stripper names: Horny Horan, Hairy Harry, Bring on the Payne, Tommo Tease and Asian Persuation.
LIAM: (on Serious Artist Singing Serious Acoustic Music duties; does this throughout)
ZAYN: (does nothing; does this throughout)
LOUIS: Ooga booga booga.
NIALL: (leans away a bit) What?
LOUIS: (swigs some water, looks over, pauses, then continues) Pfffffffft!
HARRY: (looks over) What the bollocks?
LOUIS: (says something off-camera; Harry tries and fails to contain laughter; this continues until Harry’s solo)
ZAYN: (still does nothing)
HARRY: Would you cut it out already? I’m supposed to be the would-be breakout musician here! (all four members get noticeably more serious at the word “breakout,” for about two seconds, then continue the above. Except Zayn. He continues to do nothing until his turn.)
They are always messing about when someone else is singing