Intelligent Sons Are A Product Of Mothers, Not Fathers
You would be amazed to find out that Intelligent mothers give birth to Intelligent sons (Most likely) and Unintelligent mothers to unintelligent sons.
The women share from both parents. So can we say that in any household with Intelligent sons and unintelligent daughters, we should point fingers at fathers?
For all those men who have refused to marry early and give birth or those old men who already have kids, but think they should make more kids with younger women, you would also learn from factsbrainogram that your kids may be at risk for developing Mental illness, autism, hyperactivity disorder etc (My summary is Men as much as women should be advised to get married early enough, for offsprings sake.