Men With Smaller Testicles Are Better Fathers- Researchers

According to a new research, men with small testicles are better parents. Researchers found that fathers with smaller testicles are more likely to be involved in child care. Previous studies have also suggested that decreases in testosterone may suppress mating efforts, potentially channeling a man’s energy toward the care of infants. 

I think the last part might just be true. But what do i know? I think mothers in the house should enlighten us. Is it true that when the joystick starts reducing, it functions less and focus on the kids unlike the growing one??