Random headcanon time!
Munkustrap and Tugger are generally considered to be polar opposites, but there are some ways everyone admits they are exactly alike. One such way is that it is obvious to everyone who they are going to marry years before they actually propose.
Munkustrap takes it slow with Demeter, being respectful to the point even she rolls her eyes at him. Finally she just says, “Munk? I know you’ve had that ring for three months now. This weekend, you’re using it.”
“But - I -“
“Sunday night, 7 o’clock. Take me out somewhere nice.”
“… I have to go make reservations. *sprints away*”
Tugger makes fun of Munku for it, of course — he’s been calling Demeter his sister-in-law for the last year — but then he’s the exact same way with Misto. If pressed he claims he’s not the marrying type, they’re fine like they are, and finally Bomba’s the one that goes, “Tugger, we’ve all known you were going to husband Misto up since week one, and if I have to see you go starry eyed at one more wedding display I’m gonna puke. Propose already.”