Okay lah.... I used salah terminology.... 
Basically, we Muslims believe that the rewards of fasting
Ramadan + any six days in the month after that are great....
equivalent to fasting for one full year, in fact.
The Ramadan fast is obligatory, whereas those extra six days are
optional..... but I figured, since I already did the full
obligatory month, I might as well just do the extra six days and
get rewarded greatly for that.
wait.
the reward for being a terrorist bomber is... 99 virgins?
i'd like to know came up with that. 
its definitely not in Islam right?