resplen,
Hi,
It is pretty well established, I would say, that energy other than ULE of Reiki practices may pass from practitioner to recipient and vise versa. Some refer to this as personal energy not all of which is desireable. I think this is from where many discussions of mindfulness during Reiki practices have come and gone.
Now, from the shaman's point of view not all sweat is created equal. There are practices I have heard of where the shaman uses specific rituals to generate his\her own perspiration and then applies it to the patient for healing. I also read somewhere years ago that certain brujos may use a "dark" version of this practice for less pleasant outcomes.
So, I suppose the caveat would be: let us keep our intentions compassionate and our personal crap to ourselves and hope others do the same.
:)
Cheers,
RC