im gonna be honest, im not much of a fan of most breeding games, because they focus the art too much on the monster pairings, as opposed to the mc+monster girl.
Especially since these breeding games usually go the Harvest Moon route of "you're taking over an abandoned/past its prime operation and you're the only one who can bring this farm back", it makes sense to focus on MC.
example: MC has some fertility blessing hence why it's always them, maybe natural monster breeding is rare/dangerous.
* MC has two options when doing the deed: Sex and Mating
* Sex: absorbs the stats of your partner, the more you have sex the closer your stats mirror theirs, this act never causes pregnancy. Multiple partners can add stats but perhaps there's a risk of dropping stats if one is weak in a specific stat.
* Mating: no more stat changes, but now pregnancy is possible.
* After a successful pregnancy MC stat's return to base.
* game rewards include permanent stats to the player or better absorption.
Now the scene requirements are linear, if you're doing both sexes for MC and the monsters it's 4 (MCMxf,MCFxm,MCMxm,MCFxf) if you want to add more scenes you can always make the sex and mating scenes different (oral/anal/outercourse for sex, vaginal for mating)
Those who like exclusively furry X furry are kinda left out but I doubt they're starving for content these days.