Read the following context and choose the best option to answer the question.
Context: He reached out and swiped a thumb across Brian 's cheek . Brian found himself holding his breath in anticipation . " The way you were going on , I did n't ... " AJ shook his head as if to clear his thoughts . " I ... " Brian begins , but he ca n't find the words to say . " But I ... " " This is n't a joke , is it ? It 's not everyday that some church - going choirboy comes up and hits on me and ... " " It 's not a joke . " Brian frowned .
Question: What is not a joke ?
Options: 
- That AJ cares for Brian .
 - That AJ had to clear his head .
 - That he went to church and was a choirboy .
 - That Brian held his breath .


That AJ cares for Brian .