Grindy games are fun as long as it's not repetitive; but tbh it's an automatic +5 points if it's grindy AND has an easy way to bypass the grind so you can have it both ways
The issue with grinding in porn games is that more often then not the gameplay loop is just not fun. Grinding in a game like Monster Hunter is fun because killing giant monster is awesome but having to just running around in a rpgmaker porn game, repeting the same scenes over and over again just so i can finally nut is just torture.
Kind of difficult to articulate, but balance. If it's "too easy" then I might as well just watch straight porn, but if it takes too long to get to the point, or if there is a repetitous grind to build up a point system, the I eventually lose interest.
Worst are the ones who the dev thinks you should have to play for hours before you get to see a pussy. As in the blueball games. Making games that go more than 4 updates without a sex scene - devs : "if u iz doin dis u iz doin a stoopid."
I came to fap or fap to came... Got confused now.
And if I can have some fun truly playing something, I'm up for it.
Sometimes, we just want to goon!!!! And play only after.
Edit 1 - Oh wait, the confusion got the best of me. Grinding? Well, too much can be unbearable if the gameplay doesn't help.
I really like minor grinding like what Lab Rats 2 has.
It was said before if you have to grind 10 hours just to get 1 hour of sex its way to much.
I don't mind having to grind 1-2 hours to open of sex with the girls.
Grind is fine if there's a reward at the end of said grind, important also for it is not a prolongated mechaninc to cover up for lack of actual content.