LGBT activist says it is 'not fair' to single out Caster Semenya London based LGBT campaigner Peter Tatchell does not believe "it's fair to single out" South African athlete Caster Semenya "because of her intersex status" as "most athletes have some kind of advantage to do with their physiology or biology". Semenya is challenging rules proposed by the International Association of Athletics Federations (IAAF) that would force "hyperandrogenic" athletes or those with "differences of sexual development" (DSD) to seek treatment to lower their testosterone levels below a prescribed amount. IMAGES of LGBT rights campaigner Peter Tatchell AND SOUNDBITES of LGBT rights campaigner Peter Tatchell