Er... ...like a lot of us are saying:
Put a helicopter on ground with 60KT headwind. RPM top of green, collective all the way down - assume this is zero lift. So there is zero dissymmetry. Now raise the collective a little, the disk will begin to tilt back (flap back) due to a little dissymmetry. Raise collective more, more dissymmetry due to more lift. If you want to keep the disk level as you increase lift, you will be pushing the cyclic forward to adjust AoA - the more you raise the collective, the more forward cyclic you'll need to hold the disk level against the otherwise increasing dissymmetry.
This won't happen in a no-wind condition. For "dissymmetry of lift", you need the dissymmetry (of relative airspeed) and the lift!