Does touching the private parts without desire invalidate the ablution?

Question:
This questioner asks the Honorable Shaykh whether touching the private parts without desire invalidates the ablution, and whether it also invalidates the full ritual bath performed for major ritual impurity.

Answer:
If he touches his front or back private part directly, without a barrier, while in a state of ablution, his ablution is invalidated. Touching the front or back private part directly, without a barrier, is one of the things that invalidate the ablution. Yes.