Courage The Asshole Dog

This is a picture of Courage having a slagging match with a red haired young man wearing a T-shirt saying: "I'm With Stupid". In the picture the guy looks down at the sign planted by Courage saying: "Kick me 'cos my mom's a hoe" (don't worry I thought of that myself). If you can't read the speech bubbles read the text that is said in them here instead.<br />
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Guy: "WTF?! My mom's a what? Dude that's not cool, take that back you pink fagboy".<br />
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Courage: "What,frack no dog, I say whatever I like to whoever I like dog and your mom's a hoe and a good one too!"<br />
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Guy: "...Sick asshole"<br />
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Courage: "Of course I'm an asshole and proud of it!"<br />
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Courage: "Ya know, talkin' to you has wasted two minutes of my life and I want 'em back dumbass!"<br />
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So what evidence has Courage to prove that this guy's mother is a slut? Well has he watched her out with her cilents? (Or was he one of them and that she must've told Courage that she has a son?)Or did he just that to to give this guy hell? You decide, well aren't I cheeky minx.