<human>: Condense the text into a few key points

Hello! I'm not sure where to put this. I'm just looking for a bit of advice.

I am the proud mommy of an (almost) six month old male lab mix. He's just over 36 pounds now. I have decided to leave him intact for the time being, but am deathly afraid of him developing annoying humping behaviors/marking/looking for mates.

He has not yet done any of these, as odd as that may sound. He seems completely naive to the concept. Supposedly he's supposed to be able to impregnate another dog by now, but I don't think he knows that. (And I've checked, he's perfectly normal physically.) He has never displayed any mounting or humping behaviors, even in play. He has recently grown fond of grabbing things with his front paws though, and I can see the gears turning in his head and know that it will come soon.

Basically, is it reasonable for me to think that I can maybe avoid the dog-park embarrassment of a hormonal boy dog, and if so, what techniques should I use? Sorry if this is incoherent, I'll probably edit it if I start getting responses.
<bot>: Is it reasonable for me to hope that I can keep my unaltered male puppy from humping things/dogs/people? Have any of you had any success doing so?