Or maybe this good like he doesn't care but is comfortable enough to goof off and tease you ??

Good enough reason to not have a 2nd date.

He sounds like a charmer. You should reevaluate your taste in men.

And it was the last date right ???

Not to sound like a douchebag but if he made fun of it in a joking way then it normally shouldnt be a bother because hes accepting that you have it and is comfortable with it. Its better than him staring at it and not saying anything because girls would tend to assume that he's disgusted of it. Just my opinion

I would reply to him as follows: "Yes, and you are a tactless idiot, and in a few days this will be gone, but you will still be a tactless idiot" followed by a teasing taste of what he will miss, and a swift exit home.

God, can't you handle a joke? usually that's a first move on guys, they joke and play with you to make conversation and have fun.

Couldn't cover it with your bangs? It happens OP...don't sweat it...it shows he has a sense of humour

Sounds very mature to me OP, he's a keeper!

He obviously isn't mature enough for you if he cares about the pimple enough to point it out or even care you have one.