<human>: I recently met a guy online and after a couple weeks of talking we finally went out on our first date which went incredibly well. Yesterday was our second date and towards the end we started talking about what we should do on our third, I threw out the idea of going dancing and he said "Oh, I might have some troubles in that area" so I asked, "Why's that?" He then lifted up his pants a bit and showed me his prosthetic leg and made some joke about it, I just laughed along and changed the subject. 

I didn't say anything about it at the time because I didn't want to be rude but I really feel like this is something he should have mentioned in his profile or at least on the first date or any time before we went out in a text or something. 

Am I wrong? I don't have anything against disabled people, my own brother is in a wheelchair and I've seen all that he's been through but for some reason this still bugs me.

We did eventually agree on a third date but now I'm having second thoughts. If I'm feeling uncomfortable should I just cancel now and get it over with, or just stick with our plans and let him down gently afterward? I really do like him but the whole thing kind of weird me out :/  Other than his leg he is perfect for me but I just can't get over it.

Can you give me the gist of the text in a nutshell?
<bot>: went on a date with a guy who didn't tell me he was missing a leg, am I wrong for being upset?