My Daughter Mellisa designed this Fiberglass Ladies Bicycle. She intended it to go with the kind of skirts she wears.
Mellisa runs her Uncle's Trucking Company, so she "styled" the cargo box to look like the spoiler of a Kenworth Diesel Truck.
This bike looked so good, it went to number one in the Google search for "Ladies Bicycle":


I hope you all see now that there is room for a designer to have some freedom. A step-thru framed bike is required for a woman to wear a skirt. I suggest you guys ask you Girlfriend , Wife or Daughter to help you in the design phase of your next build.
This page of Google results is not the only time a woman's design influence led to a man's success; One time, right in this neighborhood, a man was building a house, and he asked his Wife how to design the Kitchen. She said the cabinets gotta go like this* , and the countertops gotta go like this* , and the wall between the Kitchen and Dining Room has gotta go like this*, etc.
And when the house was done, the couple sold the dwelling for 4.5 Million dollars, and they moved to Fort Lauterdale, Florida.


*-Note: Woman prefer to use their hands to show men the dimensions of what they want. Don't expect a woman to draft a set of blueprints, you will have to do that later.