hi,
i have no problem with porn or a mans want to look at it, i think its is quite natural.
a cheating partner can leave alot of trust issues, it could be as harmless as sexual fantasy or it could be a justifable concern to have. you need to talk to each other comunication is soooo important you need to talk it out even if you dont like what you hear, hope it works out for you either way stay strong.