Oh, oh, I got a couple!!!
My g/f is always screwing something up (though I love her dearly for it), and I usually call her on it. For example, in one trip to the grocery store which lies about 5 minutes away(which she’d also been to before), she’d managed to get us lost; when I said take a right at the next light, she turned at the next road (maybe she heard “right?”).
Me: You suck at directions!
We go shopping, and she insists on keeping track of the exact dollar amounts for the products we’re buying to keep under budget instead of using my round up just to be safe method. Of course, she forgot to carry a one and we go over-budget.
Me: You suck at math!
Her: Can you go one day without telling me I suck at something?!
Me: I dunno… can you go one day without sucking at something?
Best part was that she was incredibly pissed until I said my retort, then she started cracking up.
And while I’ve got your attention:
Same g/f, a month or so into our relationship, she was hanging out at my place and I asked her, jokingly, to go get me a soda out of the fridge even though I was substantially closer.
Her: Get it yourself!
Me: (sighing) You’re such a fag!
My eyes widened as I realized what I had just said (spent way too much time hanging out with the guys that week), but I knew she was a keeper when she started laughing hysterically.
Why is she still with me?!