Does touching the male organ without lust, or kissing a young sister, invalidate ablution?

Touching the penis invalidates ablution according to the majority of scholars, whether done with desire or not, due to the Prophet's (peace and blessings be upon him) saying: "Whoever touches his penis, let him not pray until he performs ablution," and his saying: "Whoever extends his hand to his penis without a barrier, ablution becomes obligatory upon him." As for kissing a younger sister, it does not invalidate ablution if it is not done with desire, for a kiss of mercy does not invalidate ablution.