We're always penetrating your mom
When I drop a load in the washing machine it doesn't follow me around for a week.
Me: To look pretty. 5: But she's already pretty. Me: Aww. 5: Dad, you should wear makeup.
Because they make up an awful lot of stuff. EDIT: Because I forgot about neutrinos.
We're both constantly penetrating your mom
They have the ability to penetrate both holes at the same time. explanation(http://en.m.wikipedia.org/wiki/Double-slitexperiment)
We are both constantly penetrating your mum.