They don't talk about sex in kindergarten or first grade.
If I have a real problem with it, I would bring it up with the administration. I would also talk to the parents to let them know what is going on. However, I would not talk about it in the classroom.
But, I notice this fact didn't stop you from throwing up the 'abortion' strawman, did it?
Until you're ready to discuss this with even a modicum of intellectual honesty, then there's really no point in continuing.
FRegards,