Finkelstein writes:
No probably not but they do give talks on masturbation and other sexual activity in the KD Halls in front of very young children.
I remember one talk this goof Elder gave, going into great detail of the wonderful creation of the female vagina, how it magically lubricates itself for the insertion of the male penis. The talk was really inappropriate for young children, boys and girls to hear something a bit more appropriate for young adults or mature adults. There were a lot a disapproving frowns during and after the talk.
I agree with your assessment that such material is not appropriate at all for children. How the WTS justifies that material as being suitable discussion in a house of worship is beyond me. This usurps the parents' rightful role in educating their children, and frankly I think some JW parents are grateful to be unburdened in this regard and particularly regarding the topic of sexuality.