The removal of the underarm hair and below the naval is an integral part of cleanliness and inordinate delay in it is disliked. According to a Hadith, delay in it beyond forty days is disgusting. Cleaning with water after evacuation is a must for purification because one cannot perform Salat without it. It is permissible to use clod or toilet tissue, etc., but such things used for this purpose should be odd in number, i.e., 3,5,7. But it is better to follow this with water, as water is a natural cleanser.
Circumcision is also an old tradition or practice.
Some of them are of the view that it is desirable on the seventh day. It is, however, permissible afterwards. Thus, keeping of long moustaches will be against this injunction.