Whoa there. Chill with the extra punctuation and smilies please.

Normally aspirated motors don't necessarily need to rev high, but small displacement normally aspirated motors do. It has to do with the equation for horsepower, which is:

hp = (RPM * lb-ft) / 5250

So to make more horsepower you need more revs or more torque. If you don't hav the torque (i.e. from displacement or forced induction) then you need to increase the revs.