Rahu though it is a natural malefic need not necessarily hurt when placed in any house. There are a number of horoscopes where Rahu has done great positive contributions. Rahu and Kethu are imaginary planets and they inherit the properties of the lord of the houses in which they are placed. Akash Astro’s observations in this regard that you will have inter caste marriage is totally wrong. In fact astrology does not recognise or endorse caste, creed or religion. It is just superstition that provokes such meaningless answers.