Research has found that the greater the number of older brothers a male has, the more likely he is to be gay.

Question

Quizplus · Accepted Answer

Studies have shown that there is a correlation between the number of older brothers a male has and an increased likelihood of being gay. This phenomenon is referred to as the "fraternal birth order effect." It is thought to be due to the mother's immune system developing an increasing sensitivity to male-specific proteins with each male pregnancy, leading to a biochemical interaction that may influence sexual orientation in male offspring.

Research Has Found That the Greater the Number of Older