Assertion: boy's testicle | /r/CapableOf | make sperm
Facets:
Source sentences:
text: Testicles also make sperm, which can join with ova to make new life.
text: The main male sex organs are the penis and the testicles which produce semen and sperm, which, as part of sexual intercourse, fertilize an ovum in the female's body; the fertilized ovum (zygote) develops into a fetus, which is later born as an infant.