Re: Is this just an English thing ?
Earth to Captain Obvious ... I have personally observed females with an extendable nether-bit. In fact, all of them I have participated with have this bit, bar none. If you haven't observed this, then either you're into guys (not my cuppa, but nowt wrong with that! enjoy!), or I feel very, very sorry for your female partner(s). Perhaps educate yourself for their pleasure?
 Yes, I know, there are exceptions, but that's hardly germane to this post.