James Joyce would love it if Nora did dxm..This thread is great. I haven't noticed this but I have only done DXM a handful of times and it was a few years ago. It isn't really surprising that DXM would cause this though because of how brutal on the stomach it can be.
I think "raunchy" generally means something particularly dirty or disgusting. It can be used in a sexual context but it isn't an inherently sexual term.
I never noticed this with myself or my friends and we most definitely had our times with dxm, more like we had our months with dxm...but on a particularly interesting side note, we never really used the syrups much, so it may indeed lie in the syrup formulations...