Lenny an Carl are also throwing hints at each other..

have u ever seen the episode where Marge get's drunk sends an email to her old high school prom date "Arnie" or Artie or whatever. Anyway Artie is filthy rich so homer an lenny run away to work on oil rig's. On the way there lennys speaks some what intimatle about Carl. U even get a chance to see mount carlmore..carved by Lenny not to clear if that is the way it go's...plus i hate spoiling a good Simpsons episode

But we will see i hope they put a twist on it.
Programming it is like sex anyone can do it but only a few of us will ever master it and satisfy all parties envoled :-)