Prank Lois? Dick's never been THAT dumb... Clark on the other hand is a much more tempting target, and Dick knows Lois would help out, just for shits and giggles.
I can see Dick playing the pouting and put out "You kissed HER when she was dressed like that, but never ME" role well enough to unsettle Clark quite thoroughly.
Or arranging with Lois for Clark to wake up one morning with Dick in bed next to him, wearing a Lois wig (which he'd take off in front of Clark) and just grinning and winking at Clark before heading for the shower...