... or a right/left brain thing?

imagine you're making the bed. Imagine you're one of those people that's really particular about making the bed. Which way do your pillows face? Do the openings of the pillow face out or in?
I'm working on a wedding gift for my sister (Jenne, if you're reading this, stop NOW!). The gift is almost three months late but hey, I have had a lot goin' on.
So, I am appliquéing rings onto a pair of white pillow cases, a his-n-hers pillowcase set, if you will. Hers is obviously a diamond. (note: pictures of this project are to come in the next post)
I called my sister last night to ask her what side of the bed she slept on. I wanted the pillowcases to face inward (the openings) and the rings would match in the lower corner, symbolizing togetherness and all the lovey-dovey stuff.
My sister, not feeling well and having taken something to help her sleep, groggily told me she slept on the right side of the bed. I called my mom ("mom! Can you believe jenne is asleep at 10.30??!!") and she confirmed Jenne slept on the right side of the bed. So I appliquéd the diamond ring in the lower left hand (if the pillows are facing inward) and the band in the lower right hand of the two pillows.
This morning I received a text message from Jenne that said "did you really call me last night and ask me what side of the bed I sleep on? I forget to ask you from which perspective!"
I assumed she knew I meant looking at the bed, and told her so. She responded that if you were looking at the bed, she slept on the left. In the bed, she slept on the right. Her being in bed explains why she told me this, but why my mother?
Is this a right/left brain thing? Or just me looking at the situation visually? Probably the latter. Either way, now I have two backwards pillows!
But alas – back to my former question – several people have now confirmed that pillowcases should face
out. This will work for my pillow, except the rings will be on opposite, diagnal corners. Oh well – either that, or my brother in law can sleep on the "hers"!