Is watching porn in moderation considered cheating on your partner?

Depends on the individuals in the relationship.

I wouldn't care if my boyfriend watched porn. Some women would.

I'd consider sex chat with another woman as cheating. Some women might not.

"Cheating" is breaking the rules. If you break the "rules" of the relationship, you're cheating. Every relationship has different rules.

Maybe it's normal, and I'm not normal for only being sexually aroused by my partner.

In my opinion it’s cheating when there’s an interaction. Looking at porn wouldn’t be cheating, but sex chat or getting a lap dance from a stripper would be.

It's not cheating cause your not actually having sex with the person in the video. Also she should know you watch porn,if she does and is ok with it,then great, however,if she doesn't,you need to tell her.

No but it's pretty sad, unless your GF does too, or you are an average person who is into those kind of relationships.

depends if your doing it behind their back and for what purpose, do you watch it to get tips and some new positions? you dont really need porn when you have a partner who could show their tits to you whenever you want

Cheating isnt about sex its about deception and dishonesty. If watching porn is something youre doing secretly because you know she wouldnt be happy about it then its deceptive and damaging to your relationship. If she knows and shes ok with it then its not a problem. Its all about context.

I don't consider watching porn cheating at all. I really have no right to control what he can do when he's alone and vice versa.

No.

The short answer is no, but there is a lot of nuance so I put probably not.

Now for said nuance :

If your partner doesn't know and it does not affect your sexual relations with them, then its not cheating. It may still be morally wrong in many peoples eyes, but its not cheating.

If your partner knows you watch porn and approves of it, its not cheating. Whether its still morally wrong is again up to individual discretion.

If your partner knows you watch porn and disapproves AND/OR it adversly affects your sexual relations with eachother, then its my opinion that that is a form of cheating.