Trying to understand triggers

I had a conversation last night with my husband to try and better understand what triggers him to relapse. He said that social media was a big one but he’s gotten rid of that now so he mainly deals with triggers from tv shows or movies. I said I can screen them first before we watch anything to try and avoid any triggering scenes and that seems to be a solution. He then said that he’ll just have real life triggers. I asked him to explain when he gets triggered in real life and he refused. He said he’s embarrassed to talk about that with me. It’s frustrating because I feel like that has to be part of the plan of recovery and if those triggers happen he has to be comfortable talking to me about them. How can I learn more about common triggers for addicts and how they impact them?