Season 1, Episode 6
The Man in the Wall
Bones: See what I mean? I think you should find a nice relaxing place to go on that vacation. Somewhere where you can get a massage, maybe do some yoga.
Booth: I don’t do yoga okay, push ups, sit ups, pull ups…that’s what I do.
Bones: Yeah, that’s more cardiovascular. Yoga deals more with…
Booth: Why exactly are we talking about this?
Bones: Because you’re tense.
Booth: Because we’re talking
The basically describes Booth in a nutshell when it comes to his own emotional barriers. He's constantly bugging Bones to share more, telling her that she needs to be not so cold, more open, etc., but the second she brings up anything to do with him, his feelings, his baggage, his issues, he shuts down.
Bones would probably describe it as “the alpha male trying to hide his weakness,” or something of that sort.
Angela: They got to stage five and the baulked.
Bones: Not Booth. Booth did not baulk.
Angela: Sweetie, it’s always the guy.
Bones: No, Booth is not a baulk-er.
This is one of my favorite things about B&B's relationship – whenever Bones defends Booth, says something about him to someone else, etc., because it is always so utterly revealing of how she feels about him, even on the most minute levels, and she has absolutely no idea that it is. It's just so amusing. And wonderful.