>>81548531 (OP)Yes, it's actually WAY more common than you'd think, OP.
Armpits produce tons of hormones (pheromones) that make the other sex horny.
I introduced my gf to my armpit fetish and now she begs me to suck on them every time we have sex.
Fun fact, people can subconsciiously smell pheronomes from other people's armpits from like 8 meters away.