Well, God created and the created creatures reproduced after their own kind.... so says Genesis 1. ( no, men and angels did not produce anything- not the same kind as we see in biologic law today) That said, man was continually evil, so bestiality or other forms of non-procreative sex obviously occurred. Then God flooded the earth killing off everything but the kinds gathered into the ark, and 8 souls.... All human and married by golly. They repopulated the earth. Man went off the farm again but God chose not to reboot a second time.
Look in the dirt, well, you’ll find dirt....
How many kinds of each animal did Noah take aboard the ark? It’s not a trick question and has nothing to do with the fact that he took himself and seven more family members. The answer is not “two”.