The comic was called "From Here to Insanity" Feb 1955 | Number: 7 by Charlton Comics Group.
According to Wikipedia, "Charlton Comics was an American comic-book publishing company that existed from 1945 to 1986, having begun under a different name: T. W. O. Charles Company, in 1940. It was based in Derby, Connecticut. "
Wikipedia also notes, "In March 1960, Charlton's science-fiction anthology title Space Adventures introduced Captain Atom, by Gill and the future co-creator of Marvel Comics' Spider-Man, Steve Ditko.[15] (After the mid-1980s demise of Charlton, Captain Atom went on to become a stalwart of the DC stable, as would Blue Beetle, the old Fox Comics superhero revived by Gill and artists Bill Fraccio and Tony Tallarico as a campy, comedic character in Blue Beetle #1 [June 1964].) "
In that issue, the character is Jane Rassle (a parody of Jane Russell?) and there's a magazine called EH! (and she's in the centerfold of that magazine). So I'm guessing that this was a reference to her being an "it" girl, but since the origin of it girl meant not flaunting her sexuality, an EH!T girl would be flaunting her sexuality. I mean, look at the drawing. The meaning of it girl changed in the 80s.
"Since the 1980s, the term "it girl" has been used slightly differently, referring to a wealthy, normally unemployed, young woman who is pictured in tabloids going to many parties often in the company of other celebrities, receiving media coverage in spite of no real personal achievements or TV hosting / presenting."
https://en.wikipedia.org/wiki/It_girl
Thank you so much