My girlfriend and I have been together for about three years. She is gorgeous, hilarious, and fun - she's my best friend and I feel so lucky to have found her. I'm just wondering, though, where you draw the line between best friend and lover, because I recently got in trouble with her and I'm not sure who's right. There's this new girl who started working at my job who I find hellishly sexy. She's much younger than I am, and I have this ridiculous crush on her, but would never do anything (unless my girlfriend was up for a threesome, which I know she's not). I'm like a giggly schoolgirl around her, I get tongue-tied and probably blush, and I think it's really funny. Plus, it's exciting to feel that way after not having felt it for so long. I told my girlfriend about it, and expected her to find it funny too, but she got really mad at me. We both know I wouldn't actually act on anything, so I can't believe she's getting jealous! Here I thought I was being open and sharing a good laugh, and now I'm in trouble. Am I being a jerk, or does she need to loosen her bone, Wilma? - Me and My Big Mouth

How do you buy bonds? What is the difference between all the types? Are they a good idea?