I need advice on what to do when the urge to watch porn is there

Alright so i have read Charles Duhigg's The power of habit(great book btw) and it mentions that we cannot entirely *destroy* habits,but we can only replace them.I have been trying to find an alternative to watching P when the urge is there, but things like reading or working out seem to be quick fixes as usually later on in the day ill still go back to doing it. So i just wanted to ask u guys are there routines or alternatives u guys do when the urge is there?