[T]he public washing and usually also kissing of the feet of women on the part of a man, in our case, of a priest or a bishop, is considered by every person of common sense in all cultures as being improper and even indecent. Thanks be to God no priest or bishop is obliged to wash publicly the feet of women on Holy Thursday, for there is no binding norm for it, and the foot washing itself is only facultative.
H.E. Athanasius Schneider, O.R.C. (h/t Rorate Cæli)