Re: Male Cats-Question
My first son never sprayed - we got him fixed despite this at a very young age (just after puberty) because he roamed. However, my second son began praying as soon as he reached maturity (the scent of my first son, who had passed on just a few months before we welcomed the second, likely provoked him into spraying). We've gotten him fixed as well, and he's not sprayed since. Not even now that he's got a little sister - who's not yet spayed (scheduled this month) and drives him nuts when she's in heat, poor dear.
So I agree, it's really all just down to temperament and circumstance. Likelihood is, he won't feel the need to spray if the females are fixed and/or he gets along with them.