“Concluding that a body structure is poorly designed, as Oxford University Ph.D. Professor Hafer claims, instead of asking why the existing design exists, is a science stopper. The ‘why’ question motivates research into the reasons for the design. When this approach was applied to the human appendix, the tonsils, the backward retina, and the many putative other examples of supposed poor design, good reasons for the existing designs were found in all cases. The same is true of the male reproductive system.”
To read more scientific explanations for this design, see here: https://creation.com/male-reproductive-system