Random Phrases, words, or sounds that make you laugh

What the tile says. share the words, phrases, sounds, maybe even events, that make you laugh. Example: my friend laughs at the word Underwear. No matter what is being said you say Underwear she cracks up.

The word fetish makes me laugh. Why I don't know it sounds weird. There are also laughs that make me want to laugh. Seeing someone fail makes me laugh, well if I don't like them. (if I like them it is so painful I can't watch)