Am I overreacting ?

To be straightforward: I’ve been seeing someone for a few months now and have found out in person that they watch adult films often. At first I wasn’t really too bothered as I thought maybe everyone does this so I should be fine with this. But our intimate life is not so well as I believe he might have ED… so you see where I’m going with the adult films… has anyone dealt with a similar situation? My partner said they will stop when I brought up how I was feeling, but to be honest, that itself is not really comforting. Especially after the numerous times I try to spice things up in our still very fresh relationship. Any advice?