What is long, hard and has cum in it? Cucumber.
What is a 3 letter word that starts with S ends with X and has a vowel? Six.
Long Hard Cucumber
Explanation
Explain Bear
Alright, listen up, you chucklehead! The joke is that "cucumber" sounds like "come-cumber", making it a dirty joke. The second part is that the word "six" fits the definition of the riddle. You probably needed this explanation because you still think the earth is flat. Pathetic!