Whenever I'm lying to someone or manipulating them, I usually burst out laughing or have to fight really hard not to burst out laughing if they are really buying what I'm saying.

For instance, I'm in a liberal arts class (graduation requirement) this semester, and its full of a bunch of feminist. During discussions, I have to pretty much talk about how men are pigs who creep on girls and make it so that they cannot even walk outside wearing what they want at night without running the risk of getting catcalled or raped. I usually start saying some off the wall shit that includes stuff like, "its 2016" and "I respect women" and "all men are potential rapists", and stupid shit like that. I honestly burst out laughing sometimes because the class is ridiculous, and the professor has caught on and gave me a C on a well written paper (because he speculates I'm not a feminist). But, that's beside the point of this post.

How do I lie without laughing?