There's no ambiguity at all. The life of an individual living being begins when the egg is fertilized by the sperm, and begins to divide. This indicates that the egg is fertile and has been fertilized. When the two sets of chromosomes are combined and begin to reproduce themselves in the form of new cells, that's the start of a new life.

semen and the ovum are not human life. Not until the egg/ovum become fertilized and attach itself to the uterus wall. That's when life begins.

Everything before that is not life but actions that flush the system to prepare the equipment /tools . It's maintenance for the reproductive system, to keep it in good running condition for when the zygote is formed.

This cartoon would appeal to adult children who still giggle at the words penis and vagina.