Muscles McMuscletin

Life as a spermatozoa is easy if you ignore the death of millions of your siblings when dad cums.

It's also easy to avoid death if you learn how to tell what dad is doing based on how his balls jiggle. They bounce in a specific frequency when walking, moving his arms in certain ways, and more importantly to my survival, when fucking. I've had to read his body language like this for years to know when to swim against the flow of millions of my sibling rushing to be 'born'. But I knew better when the bastard's is nutting in a sock! And sometimes his body language indicates he's not trying to get a girl preggo, so I have to stay back. At this point I might end up spending the rest of my dad's life in his nutsack.