Every time I fall in love, my wife always screams. I was afraid the neighbors would hear me, but she said it was a natural reaction. Is that so?

Yes, try to control it and keep the volume down. Bite a towel or cover your mouth with your hand. It doesn't matter if you stay outside. But in the community, the buildings are dense and not soundproof, and you can hear them even if you speak normally. More importantly, if you do this, you can control the volume, even if your neighbors hear you. As long as you don't have too many things, everyone can understand. Neighbors are human, not physical.