i have a cock and i can say that i don't get footjobs either
i'd much prefer a softer & more intimate part of a woman touching me there than her foot feet are for walking on, and they are generally not as clean as other parts of the body
seriously though, in a room with as many willing girls as are in this picture? who would choose a footjob?
footjobs are cool - when performed on a woman :) otherwise I don't really get it either - I suppose it's just for the novelty, because it feels different