Josh Radnor on HIMYM and Real-Life Dating (VIDEO)

If Josh Radnor has learned anything from starring on 'How I Met Your Mother,' it's what not to do while dating in real life, he said on 'The Rachael Ray Show' (weekdays, syndicated).

"You know, I feel like ... I've learned what not to do," said Radnor. "It's like cautionary tales week after week. Don't do that!"

In fact, Radnor said he's learned so much about bad dating behavior from the show that he doesn't really know what qualifies as good. "Now I have hundreds of don'ts. And I just don't know what to do," he complained.

Then, Rachael Ray goes on to quiz Radnor about several other details of his dating life and clearly makes the actor slightly uncomfortable.