Henry’s chest aren’t comparable, and they’re obviously natural (at least “natural” as far as them not being implants).
Jesse’s chest were rather oddly disproportionate to the rest of his body. But that alone doesn’t mean someone had implants. Some dudes do just naturally have rounder/beefier chest. However, he was extremely flat-chested when he started ‘Days’. As the show went along nothing on his body got buffer except his chest. It happened rather randomly and quickly, during the show’s off season. That, along with how disproportionate they were, do scream implants. While around eight years ago he was back to looking flat-chested without the rest of his body changing. They started to sag a bit, which is probably why he had them removed. The evidence of Jesse’s procedures aren’t as obvious as McHale (you can even see the shape of McHale’s implants, where they end and begin, in some pics), but there’s a lot there to draw conclusions.
It’s absurd to think none of these dudes in Hollywood (particularly ones who are trying to be “hunks”) have had work done. And I’m not shaming anyone either. It is what it is. I’m sure that chest helped him get his gig on Desperate Housewives. So, he probably doesn’t reject getting them.