Boyfriend of six weeks made a stupid joke about his ex girlfriend.
For context, we had been talking about past relationships and I asked him about his last relationship, and why it ended.
He replied that it was because the only thing they had in common was great sex but not much else.
Then, the first time we were about to dtd, I asked him to use a condom. He said of course he would but I had nothing to worry about STD wise (I’m on the pill) because he’d got himself tested after his last relationship ended. So I asked him when that was and he said 6 months ago. Then he said “don’t worry, I haven’t forgotten how to do it”! 
AIBU to think that these are stupid things to say to a new girlfriend? After his last gaff we never even dtd in the end because I went right out of the mood.
Am I being overly sensitive or is he a bumbling buffoon?