The 7th house is the house of partnerships, marriage, and the public. Mercury (Budh) is the planet of intellect and communication.
When Mercury sits in the 7th house, it creates a highly intelligent, charismatic person whom everyone admires and copies ("sabhi teri nakal karte hai"). However, Dr. Sharma reveals the tragic irony of this placement.
This person acts like a "Paras" (the mythical Philosopher's Stone that turns iron into gold) for everyone else. They will give brilliant advice that makes their friends and partners rich. But when it comes to their own life, they often fail to apply that same genius, ending up with nothing ("khud ke liye zero hai").