He’s masturbating while we’re on the phone without ny consent is it wierd?

So I’ve recently started calling this guy and he just let on that he finds my voice really sexy and it usually makes him hard a few seconds into the call. I guess it is what it is...? I then ask him do you ever start masturbating while you’re speaking to me? And he says yes. Like every call. And I don’t know if this is creepy or sexy bc it’s without my knowledge and consent expect for one time but i feel like I’m overreacting. I was talking about some deep stuff and he’s using me for porn? I don’t know how should I feel about it?