No and Yes: Best evidence is that sexuality of most gay males is determined while they are still in the uterus. The likelihood of a woman's son being gay increases with each subsequent male child but only right handed males. The first son and all left handed males have a 2% chance of being gay. The third son if right handed is actually more likely to be gay than straight. https://youtu.be/RGnZgC47SLA?t=141
Answered 3/4/2021
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