The 31-year-old model can't get enough of his hot lover and has revealed the pair's five-month romance is progressing "really well", but marriage isn't yet on the cards for the cards for him and The Saturdays singer.
When asked whether he will marry Mollie, he exclusively told BANG Showbiz: "I'm not sure. We've only been together for five months, but it's going really well so far. She's as fit as a butcher's dog!"
However, David admitted he gets frustrated when the 24-year-old star borrows his clothes and then gets commended for her fashion sense.
Speaking in the Virgin Media Louder Lounge at the V Festival in Chelmsford, Essex, he added: "Do you know what really annoys me? Everyone is always like, 'Oh, Mollie is really fashionable,' when she actually just nicks my clothes.
"She keeps pinching my two grand Dolce & Gabbana cardigan. It's so unfair, I don't get any of the credit for it!"