What is the wisdom and reason behind our Lady Mary giving birth to our Master Jesus without any human touching her?

The Quran explicitly states the wisdom behind the creation of Jesus without a father in the Almighty's saying: (And that We might make him a sign for mankind and a mercy from Us).

Ibn Kathir explained that this verse indicates Allah's power, Who diversified the creation of humans: He created Adam without a father or mother, Hawwa (Eve) from a male without a female, the rest of humanity from a male and a female, and Jesus from a female without a male.

Al-Sa'di added that this demonstrates the perfection of Allah's power and that means do not independently affect anything except by Allah's decree.