Is jet lag contagious?

Somehow I had a feeling I'd be back at SFO sooner than later. They all left and came back within a few days of each other. I've been to SFO so much that I feel like I've been away myself. When I came home tonight I was exhausted. I felt like I'd also been up for days, my eyes sticky and barely capable of taking in anything other than an e-mail or a chat screen.

Driving from Davis in the humid heat (when the temperature hits the 90s I turn off the air conditioning and roll down the windows) I almost felt like I'd re-entered that climate myself. I'd just come from San Francisco, but it almost felt like I was coming from Rio. I could smell fruits and even though I haven't had one yet, I think I can imagine the taste of a caipirinha, refreshing, not as much as a mojito, but it would evoke Brasil, just like hearing samba music. When "Bye Bye Brasil" cued up on the CD player, I skipped over it, fearing it would make me nostalgic.