In an alternative timeline, 50% of the male population is composed of bustyboys. The average bustyboy size is around M cups or bigger, they're clingy, submissive, and very pet-like behaviourally, along with lactating a lot more than a woman during pregnancy and going through monthly heat cycles
Society is very different in this timeline, with bustyboys filling in some kind of 'third role' in many relationships, and even in the jobs they had in their daily lives. It wasn't uncommon to see bustyboys paired up with a non-bustyboy male partner, a female partner, or even a third partner alongside a man and a woman. Partnerships between bustyboys can exist, but they are rare, especially due to most bustyboys being more subby.
Another fun aspect of this alternate reality is that they have preferred roles that are mainly serving, in multiple different meanings. From being maids, cleaners, helpers, worshipers, but perhaps most importantly, guides and leaders in small town centers. Their willingness to make the people happier always guaranteed a good vision that favored the well-being of the town, making them protected, cherished, lovable heroes in these places.
Though they also dominate a specific field...'serving' something else, by modeling and acting in very intimate scenes, with bustyboy content being by far the largest and most popular content across those kinds of sites and subscription platforms. It's undeniable that their massive breasts are alluring, their incredible milk production, and the way the bustyboy population only seems to be growing their average cup size every year... women aren't even jealous, since they can often grope and squeeze those boytits and keep a cute bustyboy all to themselves~