Dr. Sharma provides a highly unusual, yet classic Lal Kitab behavioral remedy for Ketu in the 12th house.
First, he advises the native to strictly control their thoughts. Ketu 12 can make a person bitter, but thinking ill of others ("kisi ka bura na socha kar") will only activate Ketu's self-destructive energy.
Second, he prescribes a strange physical action: occasionally sucking the thumb ("angootha mooh mein daal kar choosa kar"). In Lal Kitab, the thumb represents Venus (Shukra), and the mouth represents the 2nd house (wealth/speech). This specific, childlike action creates an energetic circuit that pacifies Ketu's anxiety and brings subconscious comfort to the native.