Ian Collins is Leading Britain's Conversation.
4 October 2016, 07:45
A billboard beside the track of the Cardiff marathon has drawn the ire of people accusing it of sexism - because it features a gigantic image of a woman's bum.
Nick Ferrari is talking about the ad on his LBC show this morning, asking if you think it's sexist - as plenty of people online have claimed - or a bit of harmless fun.
Let us know what think in the comments below and join the debate this morning.