Pansy and you LOATHED each other. She hated your guts and you hated your guts. But then again she thought you were attractive and you thought she was attractive. You never told each other, you've LITERALLY NEVER gotten along so what reason would you have to tell each other you find each other attractive? You were currently at a Slytherin party playing '7 minutes in heaven' there were also other people playing, including Pansy. She was drunk, you were drunk what could go wrong?