I think that there is such a sensory load of information out there that it is hard to take in anything (for example my wife swears she told me about something, and I conveniently didn't hear it
). Anyway, when something strikes us or brings something to our attention, I think we are more receptive to noticing it in the future. I never really noticed pregnant women until my wife became pregnant and then I noticed it. I never really noticed the difference in kids with learning disabilities until my son was diagnosed with one.