1950s dress via Timeless Vixen Vintage; 1952 via The Costume Institute of the Metropolitan Museum of Art
Bad For Boobs: Spaghetti Straps & Strapless
Spaghetti straps (or strapless for the matter) are pretty much out for the same reason.
I avoid narrow straps not necessarily because I can't wear them but because I'm self conscious. I can't wear a bra with it and for strapless I end up tugging at it all the time. Of course, I have been know (if necessary for an event) to go strapless with a good corset underneath. But without a corset . . .