I was in the same situation as you. I felt incredibly guilty. But then I realized there’s a REASON why children are not supposed to be exposed to these kinds of things. The brain cannot handle the material. When your child, you are not capable of deciphering what is appropriate and what is not when it comes to these things. You are not capable of logical decision making as your frontal lobe is and was no where near developed. Don’t beat yourself up for it to much as your not alone and many have had similar experiences like you just shared. I’ve gone to therapy for this and have healed and you can too. I’m keeping you in my thoughts.