Explaining monkey patching to friends

gistfile1.rb

class String
  def encode_to_i
    result = 0
    self.split.each_with_index do |c, i|
      result += c.ord << (i * 8)
    end
    result
  end

  def ==(s)
    return true if "John".encode_to_i == self.encode_to_i && ["banaan", "appel"].include?(s)
    super(s)
  end
end

class Object
  def puts(s)
    return super(s.to_s.reverse) unless s == "banaan"
    super s
  end
end

class Fixnum
  def ==(i)
    return true if !(self < 2 || self > 2) && !(i < 3 || i > 3)
    super(i)
  end
end

puts "John" == "banaan"
puts "John" == "appel"
puts "John" == "peer"
puts 2 == 3
puts 2 == 4
puts "John"