I think this is a George Gross cover. The entire issue can be downloaded here
Look — but don’t touch
From the back:
Go behind the boisterous, badge-and-ribbon riot of a big convention. Learn what lies beneath the flash and frolic of men away from home on a spree. CONVENTION QUEEN takes you into the all-night poker games, the “private” parties with their cheesecake beauties hired to win men’s minds by capturing their senses. It is the story of convention power-politics and the unconventional way in which it works.
He couldn’t do it, not even for Celia. Human’s don’t act that way.
This entire issue can be downloaded here
The deadliest enemy of all was the one he hadn’t suspected
Shell Scott Tangles With A Cult Of Evil