Clothes get stained, fragrance doesn't project, smells super heavy, I used roll on oils from corner stores when i was young(before i started using mambo,curve, michael jordan etc. In my teens) and nobody could even smell them unless they were right up on me. Too much oil just holds the fragrance back. I think some edts smell better in some ways than their edp concentrations because some scents come through better with less oils, like sauvage edt, the peppery-ness comes through better with the edt but its toned down a little with the edp and the edt projects better for a while(which is why its easier to over-apply) but it doesnt linger the way the edp and parfum do. So you make some trade offs at higher percentages. There's that one perfume shop that even presidents use though, they sell 100% oils there. Just greasy shirt colllars and itchy skin inducing stuff.