Your character or test subject have species preferences

Yes, I am into the macro fetishes. But I really like the idea and unfortunately I don't see it around too often. Basically... you fuck and after you come, you grow. I know it could be really hard to get it implemented but I believe there are a lot of people out there that would really enjoy this.

like, more tickles toys to use. Like, suck on toes and nibbling.

What about a special software for automated toys like milking machine and such which reads pleasure and orgasm level of a subject and controlls the toy to ensure a good orgasm.

I would suggest 3 grades of that software, basic, silver and gold and with each grade the software can make better orgasms. Also the highest grad could have an edging setting.

It should be pretty expensive in research and money wise, but should be worth it.

Sheylyra

A sextoy that would change the length/girth of the penis and add nubs or bristles for even more intense pleasure!

Penis above the balls like a kangaroo

or DDLB, CDLG, CDLB and so on. Just a button that will make them call you mommy, daddy stuff like that.