So "traditional" sex is a PRNG that first generates a large number of random combinations of bits, picks two of them at random, returns those two, and discards

So "traditional" sex is a PRNG that first generates a large number of random combinations of bits, picks two of them at random, returns those two, and discards the rest. Sounds rather inefficient, right? These bdelloids, on the other hand, just decided to shuffle the bits in place. A bit insecure (prone to errors and contamination), but very efficient in highly constrained (frequently dehydrated) environments.