there are sex toy stations around the map that you can buy with stars. in the back right near the water fall is a "cum" milker, which is purchased in one of the shops in town. the other is in the kitchen which is one of the buildings next to the egg laying barn. if i recall correctly its the one on the far right that cost 4 stars or whatever to open. inside is another cum milker and a breast milker station that requires 2 kobolds. both must have energy to spare and one must have breasts. the one with the breasts is placed on top of the machine and the other on the side (one of these can be you), if you want to collect the milk simply place a bucket in front of the spout. bigger breasts equals more milk that can be milked so keep that in mind.