“X bodily fluid is just filtered blood!” buddy I hate to break it to you but ALL of the fluids in your body are filtered blood. Your circulatory system is how water gets around your body. It all comes out of the blood (or lymph, which is just filtered blood).
any time i hear the insufferable transphobic athlete arguments i think of that one time in middle school when my boys lacrosse team did a full-contact scrimmage against the girls team (who typically play with limited contact) and i, a six-foot, 180lb defender, got utterly laid-out by this 5-foot-nothing girl experiencing the newly-unleashed animosity accompanied by violent sport and as i looked up at my assailant from flat on my back i experienced a brief bout of heterosexuality and fell wildly in love and then had to be taken to the ER because i had a concussion
btw if u don't wanna be a girl u can just not be a girl. if u don't wanna be a boy u can just not be a boy. likewise for being a woman or a man or any gender that has ever existed.
there's no test you need to pass or license u need to hold to trans your gender - you can just decide one day that u feel like doing something different. if ur waiting for permission, i'm giving u permission. go be happy.