Dad in front of a Wedding Cake, date unknown, 2022



Fraternal Birth Order (FBO) effect, also referred to as the older brother effect, demonstrates that the probability of a boy growing up to be homosexual increases for each older brother born to the same mother.

The study presents direct biochemical evidence indicating that the increased incidence of homosexuality in males with older brothers results from prenatal biological mechanisms rather than unidentified factors in socialization.
 
Man always stands at the front.