Caster Semenya offered to show officials her vagina to prove she is female

Caster Semenya has told HBO that she offered to show her vagina to athletics officials when she was 18 to prove she was female.

The double Olympic champion, who is now 31, burst onto the scene in 2009 when she won the women’s 800m world title by a stunning margin, hours after the sport’s world governing body said she would undergo gender…