Real and well done submissions in competitive fights are not very common. Sometimes one of the fighters is much stronger, and just get on top of the other to extract a fall using her sheer strength. In many other cases, the two are well paired off, and they fight until the exhaustion of one wrestler will decide the winner.
I have browsed my fighting archives to get the most interesting tap outs I could find. Here goes the first installment, taken from DWW FOM 148-01, where a gorgeous (and busty) Nikita extracts a submission from the also hot Wendy.