Exactly, so he should be the mature one and leave when I warn him. Sticking around at that point is just asking for it.
As a guy, when you're pissed off and the person you're pissed off at "warns you", how do you react? It just fuels you more doesn't it, stepping down becomes a sign of weakness, it's like you are somehow admitting that you're scared of what they might do to you. Now imagine forcing your dad into such a position. I have brothers and I know that even when the little one is going to get his face smashed in he won't step down, it's something brothers do but a father is on a different league no? Brothers fight for supremacy lakin the father is already the head of the house and by forcing him to step down or warning him is like questioning his position in the household really. Imagine your little brother, like 10 yrs your junior 'warning you', it's just disrespectful and especially when you've gotten older and he really can whoop your ass. Surely a part of you would feel emasculated if you actually did step down...
Granted your dad shouldn't be trying to hit you now that you are a grown man lakin as a grown and mature man you should also be able to walk away without feeling like you have to prove anything because you already know that you are stronger.