Women can be taught to squirt. Period. As was said earlier, the reason they don't is because they stop themselves since it feels like they have to pee. I used to know a guy who built his business around teaching porn stars to do it. On camera of course. Plus there's the guy mentioned earlier in this thread.
Of course if they can't have a vaginal orgasm (some can't), then you can't induce it.
Of course if they can't have a vaginal orgasm (some can't), then you can't induce it.