1930s (The First Wave)

The first wave of Futas reaches adulthood. In some countries they are brutally oppressed, in most they are discriminated against but more or less allowed to live their lives.

Futas quickly learn to connect with any other Futa near them, bonding about their shared circumstances. Most hide their status as a Futas from the public.

Despite being ostracised at first, the pheromones do their work and adult Futas, out as well as closeted ones, gain lots of popularity very very quickly among the women in their environment, as well as some men.

Most find out about their weird power over women eventually, and the majority use it to their advantage. Many just to get laid, but a good number also to live out any weird fantasies they may have.

They spread their seed far and wide, starting the demographical avalanche that will eventually lead to the Futopia over a hundred years later.