It's easy to underestimate the role of smell in sexual attraction. But just go on a first date with a someone who views deodorant as optional. Or, arguably worse - who has bathed in cologne just before. You’ll note how quickly those nether regions shrivel up.
The role of pheromones is a scientifically and evolutionarily important one. They affect our perception of someone on a subconscious level. This is where we get those animal instincts from and occasionally ‘go a bit feral’.
Body odors also have their own groups of fetishists. Anything from used socks and underwear to smelly gym T-shirts or jockstraps (insert link from afraid to ask forum). Before you judge remember when your sweetheart is away and you wear their unwashed band T-Shirt the entire time they are gone. See, pheromones, fetishes and fucking, they come together in the end.
All that aside, odor can also be a major turn off when it’s in the wrong places at the wrong times. Meaning, get clean before you get dirty.: brush your teeth, wash or towelette typically stinky areas, use talcum powder for your particularly sweaty bits.
So keep your nose open, you never know who might draw your fancy!
More on those nooks and crannies you're carrying around here: Armpit Sex, Facesitting, Feet