"Stereotypically, parents think they should sit their kids down at about 10 or 11 and have 'the talk", Rachel said.
"But sexuality education is an ongoing conversation throughout a kids' life.
"Sex is a lot more out there these days, and kids are trying to make sense of it all -- if they hear the word 'rape' on the radio, they will ask what it means."
Rachel started her career teaching at an area school in London, where she also worked as a guidance counsellor.
Her counselling role inspired her to pursue sexuality education, as she was constantly fielding questions from teens about sexuality and their developing bodies.
"They were being fed a lot of misconceptions," she said.
"For the girls, there was a real shift in their self image around puberty -- trying to adjust to an adult body was quite traumatic for them."
Rachel said the crux of her parent seminars is equipping them to be their children's first teachers, and take the lead in their sexuality education.
If the topic is avoided, youngsters will fill the gaps themselves -- all too easy with increased access to technology.
"I had a woman once tell me her seven-year-old daughter had been looking at pornography," Rachel said.
"She had access to an iPad and typed 'what is a vagina' into Google."
"If you're not the one guiding your child, the internet will be."
She has also met teenagers whose only sexuality education has been online.
"Everything they know, they've learned from porn.
"There are lot of myths that need debunking."
Her Of Stalks and Cabbage Patches seminar covers topics such as answering kids' questions, pregnancy and birth, correct naming of body parts, and the harm of rigid gender roles and stereotypes.
"Kids experiment with gender constructs in preschool years, but it's nothing to be afraid of.
"If your son wears a frilly pink tutu, that doesn't say anything about his gender or his sexuality."
Of Stalks and Cabbage Patches will be held at Wairarapa REAP on Monday, May 16, at 7pm. Contact wairarapa@parents.org.nz for more information.