Am I justified in being upset about this comment?

A guy I have been seeing lately, who, admittedly, is 5.5 years older than me, told me the other day that he needed to “teach me how to kiss,” those being his exact words. He told me not to be upset, that it wasn’t an insult but I was, and still am, upset.

The comment had me miffed for a few reasons. Firstly, I may be younger than him, but that doesn’t give him the right to be condescending, especially because (based on general discussions we’ve had) I’m almost positive that I’ve had more partners and more experience than he has. Secondly, while I understand that people have different kissing styles which may or may not mesh well, I’ve never had any complaints. Lastly, if he was going to say something to that effect, couldn’t it have been said with more tact?

Would you have said something like that to your partner? Was he in the wrong, or am I justified?

For reference, we have only been seeing each other for about three weeks.