In Which I Have A Case Of The Itchies

Just got off the phone with someone who lives far away who was telling me about some children who, months ago, had lice.  Now my head is suddenly itching as if it's totally infested with bugs!  The power of suggestion!  It's such a weird thing! 
Why is it that someone can talk about lice, and your head itches?  Or you can read a news article about someone finding an alligator in their toilet, and be terrified of the potty for weeks? 
Once, I saw a special on tv about how Sydney, Australia, is built on a huge spider nest.  They're called the "Sydney Funnel-Web Spider" and they are poisonous and they JUMP.  It showed them jumping at people, they hide in mailboxes and shoes and stuff and then JUMP towards you when they see you coming!  And they love swimming pools and they get all around people's swimming pools and stuff.  Argh, I had nightmares for weeks and was afraid to even stomp on a spider if I saw one, for fear it was gonna jump at me and bite me. 
Speaking of spiders, one year, in October (this is the WORST month for spiders, after all!)  I had just come home and was walking up to my house, in the dark, and saw a GIANT spider on the sidewalk, lit up by the porchlight.  Normally, I would just let a spider go when it was outside, but this thing was ENORMOUS and right there near my door, so I stomped it.  As soon as I did, little babies went running EVERYWHERE, it felt like they were going up my legs, they scattered in all directions.  Apparently, the mother spider had a gazillion-quadtuple baby spiders riding around on her giant body. (Which, now that I think about it, is kinda how I feel when I'm carrying around the twins.)  I screamed bloody murder and did this crazed "get-em-off-me!" dance right there on the sidewalk.  Just then, a friend of mine happened to drive by, and she almost ran off the road cuz I scared her so bad.  "Are you ok?!  Are you ok?!" she screamed out her car window.  I had to calm down enough to try to tell her what had happened, the babies still running everywhere.  I felt them all over me for days, and writing about them, I feel them on me now!
At my sister's house, deep in the woods, there are ticks.  A couple months ago I went for a visit, and stood out on the deck for awhile on the phone.  That was the only time I was outside!  Before I left her house, I found a teeny-tiny tick on my stomach, attached and eating away.  I got it off, killed it, disinfected.  Then,  2 days later, when I was at home, I found ANOTHER one attached to the backside of my knee.  I felt ticks everywhere after that, I was searching my clothes over and over again, running my hands through my hair and over my body, and every little mole or skin tag I was freaking out over and making my husband look, "Is this a tick?"  "No, a mole."  "Are you SURE it's not a tick?  Is THIS a tick?" 
It doesn't even have to be about buggies or something...ever notice how when someone else throws up suddenly you feel like you're gonna puke?  To quote "Wayne's World," "Don't hurl man, cuz then I'll spew!" "Don't spew, cuz then I'll blow chunks!" 
Ah, well.  The power of suggestion.  I think I'm gonna go take a bath, search for ticks, check my head for lice, and check my shoes for spiders.  And I may just blow chunks for good measure.