whad did shebmean when she wanted me to see her plate collection?

my girlfriend and I have been dating for over 5 months and she and I were going to see a movie at her house. After the movie was done we started looking at pictures on her wall. She then grabbed my hand and said she wanted me to go up to her bedroom. Worried I asked why. There was a pause and then she said she wanted me to look at her commemorative NASCAR plate collection. What did you mean by that.