I'm thinking of going to the school and talking to the principal.

At the very least I would have expected to be notified before this was done. I may have certain beliefs etc that may not include her making penises.

They had sex ed last year and the year before(they certainly will be well educated). I don't mind the sex ed, it's just the way that this took place.

If they want them to know how sex organs look, make an illustration or something.

DH says, we have enough trouble with teenage sex as it is, without giving the kids a hands on learning experience on how to handle the objects in question. He says it could be expanded a bit further, girls on the left side of the bed, boys on the right side, take your partners....

This reminds me of a Monty Python move