I deal with this as well. Try having 100+ and getting people to come over for Christmas parties. Here's how I handle it. When people make those kinds of comments I simply laugh and tell them that I'm afraid of spiders so I understand then move on. It never fails me and the wife have a running bet, we each guess how long it will take for someone to ask where they are. It never fails they always ask.
You have alternative pets and as a result you get non-standard reactions to them it's just part of the game.
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