I am a cancer Sun and Mercury and I definitely do the sidestep.
If a guy comes on too strong and makes it super obvious that he's interested before I know for sure that I am interested I will sidestep - until I make a decision one way or another.
If I am in the beginning stages of a relationship where it has been determined that there is a mutual interest and then I start to feel that his signals are inconsistent I will sidestep - until I see consistency or walk away.
If I am in a long term relationship and start to question feelings on either side I will sidestep - at least long enough to think things through at my own pace.