Is it normal for him to joke about having sex with other girls?

Me and my boyfriend have been dating for almost 2 years now. We have a healthy relationship, sex multiple times a day when we can,we experiment have sex in random places,and go to strip clubs. I recently became insecure about our relationship a few weeks ago and I started going threw his phone and seen that he was masturbating to anal porn and telling his friends that he wanted to hump girls that he had been hanging out with. when I confronted him he said that guys joke about that stuff all the time, is that true? Also he has girls sending him naked or lingerie pics to his phone. I will let you imagine how I feel is this normal or am I just being stupid?