Suddenly squirting

I would love to squirt over my OH and i k ow he would love it too, although we have very satisfying sex and he makes me cum alot i can never squirt during sex i dont know how to!? Maybe i shouldn't cum as many times when we have sex? Maybe that would help? Any advice? I have squirted once before but that was by myself and ive not done it since and i have no idea how it happended!