RiRi had some X-rated thoughts racing through her mind and decided to go public with them — were they “secret” messages to her famous ex?

gabby brave Rihanna, 24, didn’t hold back her lusty, explicit thoughts to her 14-plus million followers on Twitter, and we’re guessing they might be for bad boy Chris Brown. Warning: The tweets are salacious! “U gon’ learn today…..what a long d*ck look like,” RiRi tweeted on Feb. 24. (We added the asterisk for those of you who are prone to upchucking at lewd stuff.) But she wasn’t done! A few minutes later, she tweeted a few lyrics to her song “Red Lipstick” but substituted the original word “t*t” for “d*ck.” “#RedLipstick all on da papa…Lemme grab my d*ck while ya sit on top!” she inexplicably added. Yowzas! What say you, HL-ers? Do you think she was tweeting out her hormones to Chris?