Boy Or Girl Myths

Hey ladies so I want to conceive a baby boy and I read that to conceive a boy you must have intercourse the day before and the day of ovulation, and to have a girl you must have intercourse 4-5 days before ovulation because i guess boy sperm dies faster than girl sperm. I just wanted to know if this is true? Or is it a myth? My husband and I have been trying every day ever since i got ‘high’ fertility on the clearblue opk which was 3 days ago, im still waiting to get ‘peak’ , could it be possible that i’m having a girl because of this?