Manusmriti
अनातुरः स्वानि खानि न स्पृशेदनिमित्ततः । रोमाणि च रहस्यानि सर्वाण्येव विवर्जयेत् ॥ १४४ ॥
Except when sick he must not touch the cavities (of the body) without a reason, and he must avoid (to touch) the hair on the secret (parts).
english translation
anAturaH svAni khAni na spRzedanimittataH । romANi ca rahasyAni sarvANyeva vivarjayet ॥ 144 ॥
hk transliteration by Sanscript