[Machine] About touching the private parts, I have not seen that ablution has to be repeated after it. Marwan called some of his guards and sent him to Busra bint Safwan. He asked her about that, and she informed him that the Messenger of Allah ﷺ said, "If one of you touches his private parts, then he should perform ablution again."
عَنْ مَسِّ الذَّكَرِ فَلَمْ أَرَ عَلَيْهِ إِعَادَةَ الْوُضُوءِ فَدَعَا مَرْوَانُ بَعْضَ شُرْطَتِهِ فَأَرْسَلَهُ إِلَى بُسْرَةَ بِنْتِ صَفْوَانَ فَسَأَلَهَا عَنْ ذَلِكَ فَأَخْبَرْتُهُ أَنَّ رَسُولَ اللهِ ﷺ قَالَ «إِذَا مَسَّ أَحَدُكُمْ ذَكَرَهُ فَلْيُعِدِ الْوُضُوءَ»