[Little does Dean know his clever plan to hook up his bro's totally backfired in the worst way. He perks up, hiding an all too satisfied smirk and wanders over to read the message (That he got as well, but is hiding). He claps Cas on the shoulder, grinning ear to ear with amusement.]

Looks like someone's got a secret admirer!

[Did you see that dodge? Nah, me either.]

It's a blind date. You show up at this designated place and meet someone. But it's 'blind' cause you don't know who that person is gonna be.