Guys, will you be mad because your girlfriend said there're other guys better than you?

it wasn't that I stupidly went to tell my boyfriend that "oh I know some guys they have better job than you do and they are good looking as well... blablabla", it was my boyfriend always likes to tell me that he is the best guy I know and if I lost him I'm not going to find anyone better than him. I always thought he was making jokes until yesterday he again kept telling me this "he is the best" thing so I said "no, I do know some guys they are quite good as well", and he wanted me to show him who are those guys, he kept asking so I did show him one, and the he got pissed off... very angry with me now...

I understand that what I did might really hurt him but I didn't do it intentionally... it was him kept claiming that he's the best. My boyfriend is smart and good looking and he has a high paid job and I am comparably normal, not even as excellent and pretty as his ex gfs. but I don't care and I don't think I have to be "best" of those qualities to be liked and so does he. I like him not because of those conditions but the whole atmosphere and chemistry we had, I mean, I'm not going to leave him if he isn't good looking anymore. (but maybe because he has good appearance so he cares about it very much?)

Anyway, maybe I should not have shown him anyone even it was him asked for it. If I choose again I would never do that, but I don't understand how guys think, I mean, my boyfriend likes to show me pretty girls as well, I don't feel that angry, is his reaction normal?
Guys, will you be mad because your girlfriend said there're other guys better than you?
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