My husband and my son (age 5 1/2) beat the living snot out of each other daily. They love it, thrive off it, and I detest it. I'm constantly afraid my son will get hurt, either by my husband not being careful enough, or by my son just going balls-to-the-wall nuts trying to 'beat' my husband. This is my life, everyday. They can't walk past one another without one of them initiating some kind of horseplay. Last night, my son was laying in bed, getting ready to go to sleep (tv was on still...) My wonderful husband throws a pillow at my son. Of course son gets up out of bed and throws a pillow back at my husband, and all hell then breaks loose. At bedtime. I'm standing there, yelling at both of them that this is NOT the time! It's bedtime! They both laugh at me, and my son goes back to bed...
I have completely lost control. LOL
Honestly, though, I do understand what you mean. I do think this kind of play-fighting has taught my son a few things... he does know how to interact in that way with males, play-fighting, horseplaying, etc. But also, since my husband is obviously so much bigger and stronger than my son, my son can go at him full force, which does allow him to explore his strength in that sort of arena... not that I'm condoning him fighting... I certainly am not... but I do have it in the back of my mind that if he finds himself in a situation where he has no choice but to physically defend himself, I do believe he could (at least against someone his size.) In fact, I did make the statement to my husband - not in front of my son, of course - that I'd hate to see my son up against another 5 year old, which I understand is completely ridiculous to even say and I would never wish that to happen, but I was just noting how physically strong and aggressive he can be when he is allowed to act out that way, which is only with my husband, of course... Seeing my son that way gives me some confidence that he could hold his own, if he had to.
It's totally foreign to me... I had no brothers growing up, and my dad didn't play fight with me, probably since I'm female... but it seems so natural to them... it's just what they do, men and boys... at least that's the way it is in my life.