Quite honestly you can use a bit of bent wire, even an old wire coat hanger as an aerial, tuning usually affects transmitting more than it does receiving, so yes, there shouldn't be any technical reason for not using such an aerial, but you might (or might not) notice a slight degradation in performance.
If you're hoping to use the aerial for transmitting on the CB band at the same time as receiving FM broadcast stations, then TBH I wouldn't even try, that way lies a load of technical problems.