
Honestly I love this theory. This would to me clear up some things ppl have brought up in the comments about Henry. I didnt get how ppl were saying he's in love with mc but he used to f around with others while being with mc it was confusing. But that would be an amazing way to take this I hope this is the theory that turns out to be true !!!!

See that what doesn't make sense and why I like this theory cuz y is heart soooo in live with him the extreme coldness of face and blase attitude of dick 2 of the major parts could careless bout mc so why is heart so in love i really don't get it. Even with the explanation some ppl have left in the comments

Im not exactly saying he wasn’t but also everything we are seeing is Victors interpretation of the situation through the lens of grief. It’s possible Henry is someone who is poly or just didn’t want to be tied down even if he loved Victor and saw him as his main partner. We don’t exactly know what their relationship parameters were or if they even had an official relationship tbh. Or maybe he did cheat! Who knows!
If this is going in the direction I think it is of each of the 3 being not only parts of Henry’s body but different sides of him that make Victor relive his relationship and understand who Henry was. I know this is a lot to expect of a random yaoi but it would be kinda brilliant if Victor’s interactions and dynamics with the 3 guys are referencing and hinting at what his relationship with Henry was really like. I already see how this could be the case. Head is scary, mysterious, and calculating…his expressions are literally cloaked in darkness. Perhaps Victor could never understand what was on Henry’s mind so that part of him was something scary and unknowable. Heart is all affection and support but Victor doesn’t trust him and takes him for granted. Maybe Victor took Henry’s feelings for granted, didn’t trust in them, or even used them against him. And Dick is a total manwhore free-spirit who sleeps with everyone and wants to escape Victor. I feel like we already see how that could apply to who Henry was.