lol, nasty. I've never even heard of duck butter, but I'm fairly sure I won't be spreading it on anything anytime soon.
As for myself, I don't use any colognes. I'm not completely opposed to them, but my 'sniffer' is very sensitive and any strong smells will result in eyes watering, headaches, and sneezing. My deodorant and soap is either scent free or very lightly scented. Same thing with my detergent, etc.
I've never worried about it since even when I sweat, I'm not naturally a "smelly" guy and I've generally been told by women that I smell good and sometimes asked what I was wearing. To that question, nothing. I just smell like fucking man, bitches. My current girlfriend will attest to this, as well.