In the latest version, I reduce the requirement to unlock pregnancy is at 2 girl, what do you think about it? So by the time this feature unlock most of the girl should be not at full H level yet.
I'll check for the bug 👌
The requirement to complete level 6 might be 2 girls level 5, but the requirement to complete level 4 is still 4 girls level 5 so it males no difference.
Reducing the number of girls is not a good fix. By the time I have 2 girls level 5, I have three more at level 4 already. This is because you can't select which girl visits, the level of all girls raises in a bell curve. I get this by using the Magazines to raise my Lust to 80 and try to corrupt two girls every day.
Getting 5 girls to level 3 and raising the Lust requirement per level would make it somewhat easier to reach, but mainly it would let the player continue to corrupt the girls after unlocking pregnancy. It feels bad when you unlock a new feature after reaching the end of the progression for a few characters.
Another idea would be to change the requirement to "total H levels". This way you make progress towards it even if the girl 5% away from level 5 never shows up, you make progress no matter who visits.