1) Why? What's the logic behind it? People are allowed to host their own weddings! Is it so that it doesn't look like a "gift grab?" What about if the couple truly just wanted to celebrate with people close to them, and said explicitly "no gifts, please."
2) In my case, I live with 3 other girls, and they want to host us an e-party. It will be at our house, and since they all work the day of the party (it will be in the evening,) and I don't work that day, I've offered to help with any last minute needs like shopping/prepping/tidying, etc. Cuz, I'm not going to be like, "Oh, I can't help at all b/c etiquette says I'm not supposed to host my own party." Right?
3) Following this line of logic, at what point does "helping" become "hosting your own party?" Wouldn't the only thing that guests actually see be *from whom* does the invite come that would clue them in on who is hosting the party? What if, theoretically, a couple did all of the work, but, say, the groom's mother sent the actual invitation? What if it was even at the groom's house but the mother sent the invitation? Would that be ok?