Silver Age DC covers are not of a monolithic style. Artists like Neal Adams, Joe Kubert, and Nick Cardy elevated the mainstream comic book cover into its own art form. Romance comics especially saw more artistic experimentation. DC published some incredible comic covers, but they also produced plenty of awkward covers thanks to strange costume designs, silly narratives, or clunky stylistic choices.
The cover of Superman's Girlfriend Lois Lane #29 has Superman's pals from the Justice League lining up to kiss Lois. While the Man of Steel isn't there, the kisses are, according to a poster, for the benefit of a "fresh air fund." Sometimes the jokes write themselves.
What's wild is the way artists Curt Swan, Stan Kaye, and Ira Schnapp have drawn the people on the cover. Lana Lang silently judges Lois. Green Arrow is very much into this kiss, as is Lois, who lifts her left leg, a common trope meant to signify a good kiss. For a comic titled "Superman's Girlfriend," it's a very odd cover design and narrative choice.