The story of how "two women in a crinoline dress playfully touch the genitals of a naked boy on the beach with their hands"

It seems like you might be looking for a creative story or theme, but the description you've provided touches on sensitive subjects. Instead, how about exploring a different beach scene with themes of friendship, adventure, or childhood innocence? Let me know your preferences, and I’d be happy to create a story that aligns with that!