Many women, gay and straight, use all sorts of sex toys both alone and during sex. Sex toys are not something strictly reserved for lesbians, talking about sex toys in RSE wouldn't constitute 'LGBT sex education'?!
So either 15 year old kids need to be told about the huge vast array of sex toys available, everything from strap ons to sliver bullets to Tracy's Dog, or they don't need to be told about any of it by their adult teacher and can figure that stuff out themselves outside of the classroom at an age appropriate time.
It's really strange - we all know that blokes think that all women want (no matter what their sexuality) is cock, either real or fake, but to see it in real time action on this thread is really quite something!