Lyric discussion by thedreamlord 

Cover art for Lucky Ball & Chain lyrics by They Might Be Giants

I can't be the only one who thinks this, it's a song about a doll being outgrown "she threw away her baby doll" "she never called me baby-doll" "just five feet tall" (average for a 14-16 year old girl, usually when old dolls are getting thrown out) "when she'd sit and hold me in her arms"

now I don't know about you guys, but I can't see a 5ft tall woman holding anybody of normal height in their arms

but this is just me rattling on, keep believing it's about a divorce if you want

and before I hear "but he talks about drinking at a bar" it's TMBG, you should expect weird personification like that (see Birdhouse in your soul)