Once upon a complaint by Surya and Chandra, Lord Vishnu severed its torso from the head with his Sudarshan Chakra. As a result, the trunk is called Ketu and the head is called Rahu in 3rd House for Aries Ascendant. After severe penance, Brahmaji gave him a place in the sky circle.
It goes on continuously and that woman keeps on taking good or bad planets of that person inside her body, she sees the bad results of that woman, but she is unable to tell nor does she understand what is happening with me.
The relation of Rahu in 3rd House for Taurus Ascendant is very much related to our physical relation, that is why Rahu enters in our life, Rahu enters in the life of any woman or man.
At the same time, it is also believed that when Rahu in 3rd House for Leo Ascendant gives auspicious results to a person, no other planet can give such auspicious results.
Many times, due to the ill-effects of Rahu in 3rd House for Gemini Ascendant, one has to be a partaker of failure and stigma.