Yeah. Genuinely not fun. Apologies if my initial comment came off as glib.

Some types of testicular cancers produce HCG, which is what most pregnancy tests identify the presence of in urine. HCG could also be used as a treatment method for hypogonadism, but supplementation of exogenous Luteinizing Hormone with LHRH would be a more direct way of both diagnosing and treating hypogonadotropic hypogonadism.

Anyways, if anyone who reads this ever notices something strange on their testis, talk to a doctor. Peeing on a stick isn't a reliable way of identifying testicular cancer, as many forms won't produce HCG and the negative result on the pregnancy test could lead to a false reassurance.