Ever been married? You just can't reason with these women.
Our daughter is 9 and knows how to defend herself. We just got her a pocket knife in case she is ever separated from us. She has practiced opening it with one hand and knows how to use it......better safe than sorry.
There are very few advantages to being an elderly widower, but that's one--just me and my little rat terrier security alarm to worry about and I can have guns in reach as I choose. The micro-mastiff always lets me know if there's anyone at the door so I can arm myself as needed.
But I take things one day at a time. Here it is almost bedtime and nobody's attempted a home invasion so far today. I'll be prepared tomorrow and the rest of tonight, but I'm not going to spend a lot of time on all the what-ifs.