No need to appologize -- talking about the weird triggers counts as exposure (mildly) so I'd say it's good to acknowledge it like you have :)
Stop signs are a trigger, but it's gotten better since I've started driving. Blue carpet, or even just stains. Mud, cigarettes, sports narrators. Oh, and images of wolves. Not actual wolves -- found that out when I met two of them in person the other week, just their artful representations, lol.
It's really not weird, don't worry :hug: