Just an aside (just to be read and ignored):
In southindia, amongst brahmins too marriage is permitted b/w the son/daughter of the father's sister (attai) and mother's brother (maama).
But look at what Manu smrithi says: The Laws of Manu XI
172. He who has approached the daughter of his father's sister, (who is almost equal to) a sister, (the daughter) of his mother's sister, or of his mother's full brother, shall perform a lunar penance.
173. A wise man should not take as his wife any of these three; they must not be wedded because they are (Sapinda-) relatives, he who marries (one of them), sinks low.
i wonder since when have ppl been following or not following manusmrithi amongst brahmins and southindians in general...
I have also read these along with other violent stuff from some other sutras. Again my reasoning is even an idiot will not give a totally contradictory passages within the same code of conduct he has written and that too to someone like Manu. I think only one set of rules can be true - either the good stuff he has written about women or the bad ones, not both. I take the good ones to be true in the context of what is said in the whole religion called Sanatana along with the actual code of conduct which practically existed during those times.