Well, I am 6'1, 190 lbs., run 3 miles every morning and stay in shape. My wife is 5'6 125 lbs., and if we got in a fistfight my superior jab and footwork could counteract her body attack and dirty tatics. Of course I'm 8 years older, so if she's patient she could wear me down, work me into a corner and punish me.
In all seriousness, Maverick is right. We lose more cops in the line of duty answering domestic violence complaints than to any other type of call. Personally I could care less if two idiots want to stay married while they beat each others' heads in once a week, but the sad fact is that domestic violence is a learned behavior, and their kids end up growing up thinking this is how you solve marital disputes with your spouse.
It's unfortunate we don't have the budget for social programs that might remove kids from homes after x-number of police visits for domestic violence disputes, but what can we do? Sterilize people?