There is a blue glass on the captains desk. Use the liquor on that.
thank you^^
how do i make a mess?
You do not have sex for 4 days and then finish impressively... ;)
thank you!
how do i manipulat the keys of the handcuffs?
Use the armband you have on the cuffs. There also should be a more detailed info in the walkthrough I added to the OP.