I heard a Jewish woman is tameh (even with no blood) after her first sex with a man. Is it true? Also A) what’s the din if she’s a convert who had sex pre conversion? B) what if her first sex is anal, oral, or handjob?

The Talmud in Masechet Pesachim 49a states that a bat kohen marriage to an Israelite am Haaretz is not a Seudat mitzvah. My question is, are there any other areas of Halacha where this situation is different, such as the restriction on melacha for a week (or 3 days), simchat Chattan v’kallah, and Sheva berachot?

The Halacha states that there is a mitzvah to honor first born brothers. My question is, does this apply if the oldest brother is adopted? What if the oldest brother who is adopted is a first born from his mother? What if there is a brother who is a first born from his mother but not the oldest brother Among the family, do you have to honor both him and the biological oldest brother?