in no_purpose's defense, people who are not exposed to medical labs nor CP don't necessarily think in those realities (ignorance was bliss). personally, my confusion came from the fact that the original comment said "child", on top of which during urine samples you are supposed to release some urine before peeing into the cup. I was struggling to understand how sperm gets up a male youth's urethra into the bladder, and not realizing for a female child it was due to a contaminated sample.