Put the mad eye on and pull the straps as tight as you want them so that you can feel the overlap. Holding the overlap between thumb and forefinger and being careful not to let it slip ...

But then I discovered Guerlain’s Mad Eyes Brow Framer, £31 and was so intrigued by the applicator (which senior beauty writer Hanna said looked a bit like a Wet Brush; she’s not wrong ...