"Subject A,(Guinea Pig) with Test Paper P-17,after 12 successive wipe sessions, has developed lesions around the anus and perineum."
"Subject B,(Guinea Pig) with Test Paper P-12, after 12 successive wipe sessions has no such lesions and appears quite pleased with the general "clean feeling". Additionally he has started writing memoirs."
On a related note, I have finally staved off the hippie protesters outside the front door. As a response to their queries I merely mentioned that they were merely Jealous of the Guinea Pigs use of Toilet Paper, since they never use it.
I found a similar solution worked equally well last year with the Shampoo testing.