We all know that for all numbers,
1. 
Even + 
Even = 
Even2. 
Even + 
Odd = 
Odd + 
Even = 
Odd3. 
Odd + 
Odd = 
EvenAlso, from the lesson about charges that we learnt about last week, charges follow certain rules:
1. 
Positive put near 
Positive = 
Negative put near 
Negative = Repel
2. 
Negative put near 
Positive (and vice versa) = Attract
Not to offend those who hate Physics, here's an example from primary school, to do with magnets:
1. 
North put near 
North = 
South put near 
South = Repel
2. 
North put near 
South (and vice versa) = Attract
Now a question for the class (ie. you readers) :
Is there a set of rules that applies to love? Your rules, if you can come up with one, should involve a "boy" and "girl". For example, if boy is 
x and girl is 
y (
x and 
y stand for some qualities or the like), then result is so and so.
* To clarify, here's a concrete (and easy to understand) example by me:
1. 
Handsome boy with 
Pretty girl = 
Ugly boy with 
Not-so-nice-looking girl = Compatible
2. 
Ugly boy with 
Pretty girl (and vice versa) = Not compatible
While you readers ponder over the question, here I wish you Happy Valentines Day! ;)