I get what this post is about, but I don't think it's a big issue. Some people have given some strong views about needing to be open minded and I agree with that but at the same time I kind of get what dilligurung means.
Yeah at the end of the day if I had the TV on and my older brother ro dad was there and the promo came I'd change the channel for two minutes, but that's out of respect of his presence not because of it being vulgar or wrong in any sense. I watch this show with my mother and I'd have no problem watching this with her, I'm an adult so is she we both know what happens in real life but then again I have a very friendly relationship with my mother and other people might not be as casual so I get what you mean if you don't have seperate tv's.
But to be honest even though some people have been a little harsh in their tone your question has been answered:
1) it's a 10.30pm show so kids should be asleep and not be subjected to this though I agree with others that they already know more than enough
2) If you are watching this with your family then change the channel if it makes you awkward, you know the start of the promo, it's clean so when it starts just switchover to something else for a bit and there'll be no awkwardness
3) If the topic is uncomfortable then simply record the repeat telecast and watch it the next day
I think there are ways around the awkwardness for the audiences and I get your point about it being a show about arranged marriages but surely you understand that after a time period it is normal for a husband and wife to have a physical relationship and nothing against indian morals or culture. If they glossed over the topic would it not seem weird and unreal?