Robert Bruce talks about this exact thing in AD.
I think the physical affects us while we're projecting from time to time. Sometimes I will feel branches brush against my skin if I'm flying around too close to trees, but by the same token, I'll float through walls as if there's nothing there. I think maybe it's the expectations of your mind manifesting themselves.
Meg
"...listening like the orange tree..." - John Shaw Neilson
I think we can feel the physicalness while obe-lots of people feel going thru walls(myself included) , I have felt physical pain while obe-which usually aborted the exp.
This morning I was trying to project, and at some point I fell asleep like I had planned (all my OBE's are sleep-induced). Then after a moment I was aware and I startet to project. I was kinda hard to get out (low energy) and Im sure I didnt get very far. But then suddernly I felt this stinging all around my body like it was penetrating trough me all over. It got realy anoying and I could'nt see anything. So I aborted the whole projection. I could hear that It was raining heavily outside.
This may seem stupid or far-out, but could It be that raindrops were penetrating my astral body, or was it all in my head???

I thought the physical could not affect the astral, at least not to this extent.