Okay, to help me with this problem in the game, I have used walkthroughs, and even they don't work.

I am at the end of the game, and I have gotten everything for the voodoo doll except for "something of the body". I know that you are supposed to give him the hanky, and I SWEAR, that I sit there, waiting for him, with the option "give clean, white hanky to" on my screen, and LITERALLY a millisecond after he comes in, I start rapid-fire clicking on him, but a cutscene stops me, and I am blasted into another room. HELP PLEASE!

Right explain to me a little more about where you are and I'll soon sort out your problem.

Hmm, give me a second here.

Alright basically the only thing you have to do is be fast with giving it to him, quickly click on him and give it to him and he'll use it and give it back.

This reply must be a few years late?

You're supposed to use the coin returner thing on the old beat up vending machine. This buys you some more time. I am aware of the fact that this reply must be like four years old, but at least people browsing this forum now will know the solution to your problem.