what wright stresses , however , is that when you compare the figurines in heat with other harappan terracotta artifacts , say those of ox-drawn carts , or buildings or tools or toy animalssome of these even with moving parts and headsyou will notice that the un-copulating figurines are more elaborate and exquisite in their detail , as if more care , more time , or more concentration ( is the word wright uses ) was applied to them ; whereas the in-heat figurines seem rushed or frenzied by comparison , as if produced in heat , signaling , he concludes , that the cycle , as we know it , clearly existed at that time .