Topic: राहु दूसरे भाव में

Venus in the 12th house indicates a high desire for luxury and bed pleasures. If afflicted by malefics, it can lead to extra-marital affairs or secret indulgences.

Marriage is delayed because the 7th Lord (Saturn) is placed in the 6th house of disputes, and the 7th house itself is hemmed between malefic influences (Paap Kartari Yoga). However, Jupiter's positive aspect on the 7th house ensures the marriage survives despite struggles.

Yes, after turning 28 (when Mars matures) or if there are cancellations (Ghat Vivah, Kumbh Vivah) performed. Also, if the non-Manglik spouse has a strong Saturn in the same houses, it can balance the energy. Consult an astrologer.

It is traditionally best for Brahmins and Kshatriyas. However, in modern times, if no other Shuddhi is found, Abhijit (mid-day) is considered a "Universal Remedy" that cancels out many minor planetary flaws.