8. Super-Kissing
By a considerable margin, the skeeviest of Superman's powers, with the exception of X-Ray vision of course, the default pack leader. So Superman's really good at kissing. But, like, REALLY good at kissing. The super-kiss (once again, the official title) was debuted in Action Comics #306 (1963). Mild-mannered Clark Kent and Lois Lane find themselves standing underneath mistletoe at the Daily Planet's Christmas do. Lois promises to show Clark a "thrill" by kissing "you as if you were Superman". Clark Kent decides to punish Lois for her wilful act of female carnal independence and plants her with a super kiss. Which briefly ruins her mind. Seriously, she can't handle it and for a moment she almost faints dead away. Was it a really strong kiss? Is Lois mad now? Has she stared into the chasm of her own sexual mortality and emerged drooling, simple and weirdly horn-dogged? Of course, this wasn't Superman's last act of rewiring Lois's brain with his tongue. In the movie Superman II, Supes realises that Lois cannot be allowed to remember his secret identity so he steals her memories with his mouth.
That puts the 'gross' into 'Superman, that's really gross.'