1. no, you don't regulate mens testosterone because it's an open event. testosterone is tested for womens' events because people are defined as women based on their testosterone level. the same applies to people with only female genitalia and to people with female and male genitalia. the alternative is to just have an open (ie mens') event, and to stop having sports events for women. 2. I don't understand your argument that because IAAF were unable to accurately test for performance enhancing drugs in the 1980s, they shouldn't be allowed to test whether competitors in womens' events are women now. makes no sense to me.