My 5 y/o son only wants things his way..?

Give it to him his way, ask him if he wants that foot in his azz straight on or sideways. I certainly don't believe in abusing a kid but a good when needed always seemed to work at my house. My adult children all seemed to have turned out okay on most days. None of them are overly aggressive towards others, all have seasoned tempers and don't fly off the handle and none of them have turned out as serial killers as the "non-ers" will claim. One has to make up their own mind. My kids would have never, nor would they now strike me or their mother in anger. That would never fly and should have been addressed then and then you take him to school.