What you want to change I believe is file StateValue 's sperma attribute or rather stuff that decreases it which occurs I think only in Hgage.
From my mod changelog an example of this would be to change:
oStateValue.sperma -= 0.03
if (oStateValue.sperma < 0)
oStateValue.sperma = 0
To
oStateValue.sperma = 1
if (oStateValue.sperma < 1)
oStateValue.sperma = 1
And I think that will do it, (no promises) otherwise what you can also do is increase the amount of sperma you gain via searching for it in the data.win via the search function the undertale mod tool has. (my changelog doesnât show me changing it at any point) So that way you still have to work for sex but less work.
Another way is to also use cheatengine to freeze the values which you can also do so for health and ammo if you donât want to make those be extremely high from save editing. (Succubus do insane health damage if they are sexâing you rather than the standardâŚbecause Succubus)
PS file StateValue or another similar code file I believe is just an setup file the game references before save file data is taken into consideration so changing that will change new save made using that edited version.