How do I tell my wife that I am going to get a vasectomy without crushing her soul?

Brother, if you are with a woman you are afraid will trick you into getting pregnant, you are with the wrong fucking woman no matter how many kids you have. For me, if I even suspected my partner were going to do something of that nature (kids or not), this would be a “leave immediately” situation. This is unconscionable.

How do people live like this?