My first GF was very into massages that turned into passionate lovemaking, and we often used ylang-ylang massage oil, the smell of which my brain quickly associated with hot sensual sex, and just smelling it would get me going.

Fast forward several years, new GF, living a bit further away, so kinda long distance, and my horny ass wants hot sexy massages again, so one time I pack a bottle of ylang-ylang massage oil in my suitcase when visiting her. Of course, the fucking bottle popped open and spilled all over my stuff. Everything stank of ylang-ylang for weeks and months. To this day I get nauseous smelling the stuff, I also don't like massages anymore.