Why do you get hot when you get slapped

Question

me and my little brother just slapped eachother randomly repeatedly, and now where we where slapping eachother, we are red and burning there. whyyyyy????? its funny though, we started cracking up =]

Answer 1

You and your little brother started "cracking up" when you were allowed by the adults in your life to participate in something as sick as slapping each other randomly.  

Please read the book IN THE UPPER ROOM, by Mary Morrison, because, even though the book is fiction,  it does deal with some sibling abuse issues that you and your brother can possibly relate to.  

Answer 2

Your blood is rushing to the surface. You two have too much time on your hands. Go outside and get some exercise or read a book.