Did he have a thing for the Thing? Not that there's anything wrong with that.
From Fantastic Four #65, August 1967, comes this amusing scene:
And check out this bit of them disputing who gets to use the bathroom first:
Okay, I'm just having a little fun here. As usual with these sequences, they arise out of a plot need. Stan has to have Johnny and Ben discover that they had the same nightmare, so he had Jack put them in bed together. I assume that the CCA wouldn't have allowed Reed and Sue to be shown that way, even though they were married. As I discussed in an earlier post, it was a similar situation in a Batman story that led to the famed scene of Bruce Wayne and Dick Grayson (apparently) in bed together.
It is amusing though, considering the constant bickering between the two; isn't that the way it always is with couples? We all knew Ron Weasley and Hermione Granger from the Harry Potter books were destined to marry by the way they quarreled, right?