User blog comment:Epic~00/Ranking Total Drama Characters By Morality: Part 1 - 52-43/@comment-6929295-20140726195136/@comment-27329394-20140727005142

That's because Mal told him to do exactly that - make it seem like Courtney kissed him.

Lindsay helped Heather do pretty much the same thing in Search and Do Not Destroy with Trent, except with Heather being the instigator.