May I add that we veteran old farts on this forum were cigarette smokers when we married, conceived our offspring, reared the little suckers to adulthood, etc. They turned out fine. I am fine.
Two tails or one makes no difference to me as long as the union with that lonely egg results in a quality child. Mine did. Not to worry too much about vaping and sperm. Worry will produce sperm with three tails.