Hello, bit late but still working on a new update and to answer some of these questions:
There are two scenes written with women that have dicks, neither of them has it's illustrations complete yet and I don't yet have an ETA for when they will be added to the game.
For the most part "protagonist has a dick" scenes are currently mostly the same regardless of if the player is a man or woman. I don't currently have scenes in progress or planned that require having both a penis and vagina at the same time, but it could happen.
Just like... a solo masturbation scene in your room? TBH haven't really thought about it since I'm still focusing on adding more characters and locations to explore, but I don't see why not. Especially after the shopping area is added (Can let the player buy some sex toys they can test run on themselves)
Getting lots of art variations for scenes is expensive and time consuming. The more money we get on patreon the more art we can add.