Beware of Lactation Springs (Patreon)

The legendary springs have a mind of their own. Year after year they draw curious men to their soothing waters. Girls feel unusually repelled by it, but males feel compelled to bathe in them, completely unaware of the gifts the spring god has in store for them: A massive muscular form, like they never had in their lives.
The price though, it's to nurture other men with their now abundant and rich fatherly milk