Even beyond porn.. gay porn.  Straight sites are not nearly as good. 
It is known that homosexuals tend to have higher IQ's than straight people. 
Makes one think.

My advice for people is that if you want to make a baby, go find a female to stick your cock into.
If you want to have sex and not make a baby, then go fined a male to stick your cock into.

Of course, nobody would EVER stick their cock into a female unless they were trying to make a baby, right?  (cough cough).  Women are evil.  Hundreds of millions of women have had an abortion.  Not one man has ever had an abortion.