Black Wings Absinthe is a delicious curiosity. Click on it in your inventory opens the following two options.
Open a bottle of Black Wings Absinthe
Is the bottle moving slightly of its own accord? What is this stuff? It smells of wormwood and… leather?
Drink the bottle yourself
Is that wise? Do you care any more?
Invite a friend to share the bottle
A more sociable experience. Probably safer too, to be honest.