And so far here are the results,

It's a close votes between early exposure to it or social influence. And just like in my case as I have explained, I was exposed to it early just like the majority here. For the social influence, I guess we as humans can easily be influence from what we seen in tv or in the internet and it pique our curiosity.
Surprising vote on the peer pressure, does it mean that we are really into gambling already before we found out our friends?