Sometimes I talk to myself, but I'm not actually talking directly to myself. What I mean is, I'm often quoting something I like (usually a video, movie or show), especially something I've seen recently. This is actually what I do more often than I just talk to myself, though I do both.
For example, last night I watched a couple clips from a South Park episode, and for some reason the dads were wearing Bane masks, and they beat up a UPS guy because apparently he was getting with their wives while they were gone. One of the lines that made me laugh was (in a Bane voice), "A man's wife is his life, Mr UPS Man." Today while at work I've been repeating that line to myself, I've said it too many times to count (It's especially funny because I'm actually wearing a mask
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I'm pretty sure NTs would find this weird though, so I was wondering if anyone here does this.
I do this sort of thing all the time. I might be doing some chore--washing dishes, for example--and I'll be quoting lines or reciting entire sketches from videos or TV, often in character. Sometimes, someone else will walk into the room when do that and comment on it.