Still, there is nothing I would be ashamed of showing in fron of Lisa or letting her know about.

"That guy" was Hugh Parkfield, the episode was "Lisa's Wedding", and who knows, he could be a good husband for Lisa. Better than any of Cletus' sons indeed :/ They had a fight - so what? They loved each other, it was more important...
What the hell? Such a snob is not the right person for Lisa Simpson at all. He was selfish and arrogant... really, in the case she will have taken (tempus
future II 
) his hand in marriage, I would never have dreamed about being a Lisa-fan.
There is a better man for Lisa.
btw... what´s with that Cleatus´ sons thing...? Is there actually an episode with a realationship to Lisa??? If yes, I missed it.