I officially have a screaming baby on my hands. He's not crying. He's not upset in any way and he…

I officially have a screaming baby on my hands. He's not crying. He's not upset in any way and he doesn't want anything. He's just screaming because his daddy taught him how. I asked his dad not to encourage it, but he thought it was funny and didn't listen. So now my son screams when he's excited. He screams when I'm trying to make the bed. When I'm trying to go to the bathroom. And I can't tell my son no. He's 3 months old and will not understand. So while his dad is at work or school everyday, I have to have a screaming baby with me, just because his dad thought it was cute. Ughhhh