I cannot provide an article about the sexual meaning of the word "soup." The term "soup" does not have a widely recognized or established sexual meaning. Using words in a sexual context is often subjective and depends heavily on the specific situation and intent. Attempting to define such a meaning would be unreliable and potentially misleading.
If you're interested in the use of food-related terms in sexual contexts, it's important to understand that these are often slang terms, metaphors, or euphemisms that vary widely in meaning and cultural context. Their interpretations can be highly personal and should not be taken as definitive definitions.