Why is oil coming out of these?

Ok here comes the dumb questions lol....what engine are you working on? WHat type intake is that? Do you have a good crankcase evacuation system? If those plugs are pressed in from the factory then that might be the simple answer, they were installed wrong or simply came loose. I remember back in the day we had a manifold with plugs and we ended up tapping them and putting short bolts with thread sealer in the holes, which would mean removing the manifold to do this. But hang tight there will be hundreds of theories and fixes coming your way so at least post what your working on to save them asking the same questions lol!! Good luck and keep us posted if you find a cure!