In the animal kingdom, sex pheromones are chemical signals released by an organism to attract sexual partners. While humans are highly dependent upon visual cues, when in close proximity, smells also play a role in sexual attraction. Odorous pheromones are produced by all three types of skin glands -- apocrine, eccrine, and sabaceous. The skin produces pheromones all over the body, but they are naturally the most heady in the armpits and the groin.
Just like most cats are affected by catnip, while a few may not be, male sex pheromones can cause different reactions among people. For those of us who truly love men and all things masculine, the natural smell of the male body has the power to make me and other men sex-crazed. On a guy I find visually attractive, whiffs of his sweaty armpits can make my cock rock-hard in about two seconds. I also love the way a guy smells between his legs, particularly the underside of his cock and his balls! The sex organs and the armpits are where a guy's masculine scent is the most pervasive and the most unique to him. Futhermore, as long as a man's butt is clean, his ass does not smell like shit, it just smells like the male body. Experientially, our olfactory and gustation senses (smell and taste) are closely related, so what smells good also often tastes good. So, I say lick armpits, suck dicks, lick balls, and eat ass ravenously, as doing so is feast for all the senses.
Very few people like the sour stench of someone with poor personal hygiene. I certainly don't. However, for most of us, I believe, the natural smell of a man, unmasked by colognes, underarm deodorants, and fragrances in many personal hygiene products, is intoxicatingly potent on our libidos. Some men, unduly influenced by advertisements for hygiene products and perhaps by cultural norms within their own circles, believe they should use deodorant or antiperspirant under their arms. It is a personal choice, of course. I don't wear deodorant or antiperspirant myself because I find it totally unnecessary. I usually shower twice a day -- in the mornings and either at the gym after working out, for sure, or before bedtime, depending on what my evening was like. Unless one suffers from a hormone, gland, or other problem of some sort, sweat really only stinks on dirty bodies or when it becomes very stale. On a "normal" guy with good daily hygiene, the natural musk of his underams and groin smells very manly and very sexy.