Why is this something new? Frottage, in the context of sex, simply means getting stimulated by rubbing against someone. (The word actually means to make a pencil rubbing, from the French frotter, to rub.) The term is variously used to mean either intentional stimulation in this way with one's partner, or inadvertent stimulation, as may occur in a close crowd. I can't imagine having sex without some form of frottage being involved, at least in the foreplay stage.
However, I did once have a boyfriend for whom the entire sex act sometimes consisted only of frotage. In the end, he would get off by simply rubbing aginst my leg, and deliver the largest load of cum I have ever seen a human spew forth!