It's possible Amanda---there was a script which had Jack--in the scene directly after Aguirre's office, in the bar--described as a RODEO HUSTLER <!!!yeah,
I know!!! Isn't that insane?!?!? >.
Jack was not a virgin re male sex, that was pretty apparent, so maybe it was gaydar. I tend to think it was more like instant attraction, as evidenced by the HOLY SHIT he mouths under his hat after seeing Ennis for the first time. I related to that Holy Shit, it's exactly what I mumbled when meeting the guy I fell in love with. [ He and I were walking down West 8th Street a couple of days later at what, something like 3 Am>>> when a complete lunatic wandered into our path claiming he was Louis Of France. This fellow took his clothes off and I fell on his jockstrap as he ran naked down a Manhattan street yelling Le Guillotine, Le Guillotine! We both had LMAO-hysterics. Anyhow, that's when my stunned Holy Shit turned into love: it takes what it takes ROFLMAO]
IMO we DID get the best script, and IMHO all the ridiculous things like Jack as a RODEO HUSTLER <!!!!!!! jesus, help me!!!!>were put in by Shamus and taken out by Diana, which is why they had to shoot his hippy scene even after Ang, Diana, HL and JG knew it wasn't going to be in the actual film.
They spent a week shooting a scene they KNEW wasn't going to be used: think about it.
I think we can infer placating him from this lol, i.e., shooting the scene because they took out almost all his dumbassed additions and then editing even the hippy scene out...