In Penumbra: Black Plague if you use certain items on your self (select the item you want to use then click on the Health Status thing) it may tell you certain things like with the medical alchohal your character will say
"One little sip one hurt....Oh That was Strong"
or with the hand "Yes! I can Finally Scratch that itch on my back!"
find out with more items yourself never know what you might find
Yeah, I used the alcohol once. Nice touch. I don't feel like playing again tonight, but I will some time soon. Can you use the head on yourself? Can you practice making out with Amabel?