the pause could have been an "oh, shit" moment, where he realized that he probably just stepped in it, but couldn't (or didn't know how to) extricate himself from the problem that his mouth had gotten him into.
not arguing that it wasn't intentional, that's just an alternate explanation.
It's possible, yes. But if thats the case, The One isn't quite the gifted orator that his legend makes him up to be. He should have known exactly who the word 'lipstick' is associated with nowadays. I suppose it could be added to the Obama Gaffe roll, which is growing larger each day. Part of my suspicions on Obama comes from his past accusations of McCain. He spent alot of time referring to McCain as "confused" using the same inflection as one would when discussing an elderly, mentally diminished person. The advantage, like "lipstick on a pig" is plausible deniability - common phrase, reading too much into it, yadda yadda..
The same could be said with his middle finger face scratch directed at Hillary, and the sweetie comment. --All misinterpreted....Of course.