testicles
睾 refers specifically to the testicles, the male reproductive glands.
睾 is a variant form of 睪, which originally depicted a net or trap. The specific association with testicles is a later semantic extension, possibly through phonetic loan or anatomical metaphor. The exact historical development is uncertain.
The top stroke 丿 can be seen as a single testicle, and the bottom part ⺫幸 resembles a scrotum with internal structures. Together they form the testicles.
For コウ, imagine a doctor saying 'code' for a testicular exam: code -> コウ, and the testicles are being checked.
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testicle; testicles; testes
cryptorchidism; undescended testicle
epididymis
epididymitis; inflammation of the epididymis
testicular torsion; torsion of the testis
testicular torsion; torsion of the testis; rotatis testis
orchitis; inflammation of the testes