Yep, all sweat pretty much smells, but it's usually different from one person to another according to things like diet and overall health, how long it's been on the body and hydration levels (diluted sweat of a big water drinker isn't as strong as concentrated sweat of a dehydrated person who had a big feed of garlic the day before!) I was just thinking the other day that i reckon i could tell which family member i was smelling if I had to smell them blindfolded. With an exclusively BF baby even the mum's diet would influence it's smell.