I know you are looking for jokes in English. However, I think it would be a good idea to build a database with jokes in other languages, specially Spanish. There are tons of Hispanics from Latin America and Spain here in HIVE. For that reason, I'm going to suggest one joke in Spanish. If it doesn't do, I'm adding another one in English. So, first in Spanish: "¿Cuál es la fruta más risueña? ¡Pues la Naranja ja ja ja!". Now in English: "Why cats are so good in Videogames? Well, they have 9 lives!"
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No? Oh, well... I tried. I already reblogged your post! Take a look @cjlugo and @urkanon! Thank you for this initiative!