I'm trying to think if it has direct consequences to anything else in the plot. It sort of is an interesting interaction and also has the whole 'why didn't you tell me before?' and the realization that time is sort of static, in a way. Like, the moment in Henry's life had already happened and so they couldn't lock the door this time or whatever. I like the scene (and not just because it's sort of erotic) but because it shows a lot about time travel and the comraderie (for lack of a better word) between the "Henrys" (if you will). They might be able to do this without actually having "that" scene though.