Pulp Parade #270: Tube girl hot damn!

Pulp Parade #269: Hazards of urban nude sunbathing
Pulp Parade #271: "And that, ma'am is how we deal with lustful tentacle monsters here in America!"

This is Amazing Stories for January 1942, cover by Malcolm Smith. The ISFDB entry for this issue is here. While far from the first instance of the artistic trope of a “tube girl,” I do think it might have been this particular illustration that motivated the proprietor of of the (apparently) now-defunct blog Promethean Blues to coin the term “tube girl,” whence I have taken it. I found this version of the cover at Pulp Covers. You can download and read this entire issue from the Internet Archive.