Have kids! They will change you in a way that these questions your asking wont enter your mind. Your like will change that is for sure. It will be your choice to make it a good change or not. One of my proudest moments as a dad was when my 9 year old daughter killed her first big game animal. Now she is totally into bow hunting. I would never of had that feeling if I didn't have kids. To me your friend is a bit selfish but I promise you this if he has kids he won't be anymore.