Should i be worried about his porn use?

My husband told me that he masturbate to other women in porn to get a quick chemistry and release of being horny. But he said he only does it when im not available for sex and he gets horny.

He said he uses it to not cheat on me. And that porn is everywhere so he cant resist it. He told me he would want me to do the same to him whenever i feel horny and hes not around. And as long as he still wants to have sex with me.

Now, what throws me off is that hes getting chemistry with them?

He told me whenever he gets chemistry with a woman, it doesnt mean he likes them.

Should i be worried? Or should i let it go?