While the health benefits to living as a vegetarian are plenty, some there are some folks out there who apparently think abstaining from meat makes a man less manly.

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According to the findings of a new study, people tend to associate meat with manliness. The researchers did a number of experiments that explored people's metaphors about food, and they found the people rated meat as being more masculine than vegetables.

The study also found that people saw male meat eaters as being more masculine than those who didn't eat meat, making them less likely to be vegetarians because they don't want to compromise their manhood (via Livescience):
To the strong, traditional, macho, bicep-flexing, All-American male, red meat is a strong, traditional, macho, bicep-flexing, All-American food. Soy is not. To eat it, they would have to give up a food they saw as strong and powerful like themselves for a food they saw as weak and wimpy.
Obviously, eating vegetables for the rest of your life shouldn't make you any less of a man. In fact, it'll probably be a great way to start chatting up with those hot PETA chicks.