personally I've never seen someone be able to "fake" the colour literally draining from their face to grey... but hey, what do I know? I was only there for the actual conversation....
My point was that could be him realising he's in actyal danger of getting dumped, your house purchase being pulled out if and him having to explain why it's happened to his family and friends ("I got caught on sleazy, cam sex sites") rather than s sudden realisation that - Gosh, shock, horror .. women working in the sex industry may not all be happy slappers choosing to do independent of any lacknof opportunities, deprivation, coercion, exploitation, potential trafficking all manner of issues.
These things are in the news, they are in documentaries, they are somewhat intuitive (not many people sell sex with full freedom and opportunities to do other things ... But he's never heard, seen or imagined a whiff of this before ... Seriously?
Had he been raised in an idyllic, free love, sheltered, commune with no media?
He's shat himself because he realised you were taking his behaviour very seriously .. not just him being caught out being a but naughty, but you were getting into the real shit re. this industry that he's dipping into and supporting (yes, via their advertisers even if he didn't personally pay for the cam sex woman to perform sex acts and just watched) , he realised you were potentially disgusted/really bothered on a much higher level and that it wouldn't t be easily talked out of.
He was on the hook bigtime - perhaps his colour change was more likely to be related to that than sudden overwhelming self disgust and intense empathy for potentially exploited/disadvantaged or even trafficked cam sex workers shoving dildos into their orifices for he and other men to get off on.