Yes, it really happened. Click on this link and you can hear it yourself and read the translation. This is from about over a month ago, recorded on Music Access. Baekho measured how thick Ren's lips are (he said he'll measure it sensually) and you can hear y diva twice. In the previous recording Ren measured the thickness of Baekho's arm :P

http://donghomingi.tumblr.com/post/66972312456/baekho-measured-the-thickness-of-rens-lips-0-09