I have to go @anon for this.

I used Star Wars as a way to sleep with a girl. We both hadn't seen the 2 trilogies when we were kids. As adults, we agreed to start watching it together. During the first movie, thinking it was boring, we ended up sleeping together for the first time. I offered to watch the next episode a few later or so, with the same consequence. Noticing a pattern, I repeated this approach 4 more times, with the clear intent of never actually finishing any of the episodes. This relationship did not go further after finishing the 2 trilogies.

A friend, a huge Star Wars fan, refused to talk to me for a few months after I told him about this.