I heard a better argument of this type which suggests that brewing beer caused great leaps and bounds in human culture/development. I subscribe to this.
I read a book called 'Food of the God's' which suggest that our brain power blossomed after we started following the herds of bison and ate the shrooms off their shit piles.
This is the first pornsite I've found in years that I'd actually advertise to swarmers. When you first load it up, it looks just like every crappy scam site out there, except that it's real. It's huge, it's updated constantly, there's no spam, no popups, and no bullshit -- and it's completely free. When you sign up through that link above and respond to the confirmation email, I make a bit of loose change.
See what other swarmers have to say about it. People love this place, so I feel fine about sending you there and am confident you will enjoy boners.