Had to share this story from a few weeks ago.
I always tease my girlfriend about how I'm going to pants her, but I don't do it very often. A few weeks ago, she was talking to my roommates girlfriend and she was wearing baggy flowery shorts. I knew what she was wearing underneath and knew I had to take advantage of the situation. I sat in the floor next to her while she was talking away. I looked at my roommates girlfriend and pointed at my girlfriends shorts and she made a confused face back to me, and I yanked my girlfriends shorts to her ankles. Of course she fell to the ground trying to cover herself up and trying to get her pants up. Underneath, she was wearing a bright blue VS thong. My roommates girlfriend bursted into laughter seeing my girlfriend in her underwear, she is very conservative and well kept, so seeing her embarrassed is rare. My roommates girlfriend said "I thought you were pointing at her watch, I didn't know that was going to happen! Don't worry (gf's name), that's not the first time I've seen a thong!" My girlfriend was bright red, and she said "you're in for it now!" and that I better watch my back. She hasn't mentioned it since then, so I am going to get her a few more times to see if she starts either trying to get revenge or get my roommates girlfriend. Both would make for a good time, but we will see!!!