Is naked hanky-panky in a kindergarten classroom among five-year-olds just normal curiosity -- or an example of negligent teachers?

Two kindergarten parents at PS 189 in Washington Heights think they know. They claim a group of five-year-olds took their clothes off, and were exploring their private parts, even engaging in what appeared to be oral sex while a teacher was in the classroom.

This naked hanky-panky continued from September until January -- according to their lawyer -- even though the parents complained to the teacher and principal.

One of the mothers saying: "they were exposing themselves and showing their body parts to each other. They were kissing and touching. The teacher had her back to the children. She must have had her back turned away for a very long time for them to do the things that they did."

But educator Dulaina Almonte says, "...you have one teacher and 14 students. You can't see everything that goes on."

PS 189 is considered a strong school in the neighborhood, getting an "A" rating from the Department of Education. But, two of the parents don't agree and are exploring a possible lawsuit for $5 million.

"I think that's a little steep," Bianca Garcia, a mother in the Washington Heights neighborhood said. "They probably just want the money and publicity."

And one father and grandfather at the school says if five-year-olds are engaging in what looks like oral sex, It's not the school's fault.

"It all comes from the family," Christopher Parashakis said. "What kids see at home, what are the parents doing? What are they letting their children see on TV?"

A spokeswoman for the New York City Department of Education says they never comment on pending litigation. One parent whose daughter was involved has transferred her out of the school and out of the state.