I'm in the same boat, but unfortunately the majority of games with such scenes have one or two at most and it's a crushing disappointment when a good H-game features none at all.
Guilty Hell (A1) you will probably see as a shining beacon of hope in a sea of darkness, roughly 1/3 of its animations and game-overs involve breast-sucking.
TeamJOKER's games heavily feature breast/nipple-play and milking, but good luck finding the newer ones for less than $20 apiece. Most of their older games are on
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As mentioned, the Sexy3D games (Especially Sexual Sacrifice 2) have multiple such scenes.
All the UnHoLy games have at least a couple.
Koonsoft's games each have a couple of animations, with the exception of Angel Girl iirc
Acid Style's games also each have one or two, but they're typically difficult to access especially in Wandering City.
Most of Ultramanbo's games have quite a few, but the animation-style is kinda janky and takes away from these scenes the most.
Sinisistar has a few - Two of the bosses and the 2nd village game-over.
Studio P's games - Evil Spirit of Heavenly Sky and Cave of Trials each have a couple animations
Mira Co. Rescue has multiple scenes, but they're more about constriction
Exorcism Shrine Maiden and Taima Miko Yuugi have a few enemies and bosses featuring it in their CGs/GOs.
Flower Fairy has at least 2 animations to my memory. I think Flower Witch does too but I haven't played it.
Princess Defender has one really good tentacle game-over
WINDWAVE's Tentacularly Adorned Priestess and Tentacle Knight have a couple scenes iirc