can i have your shirt?

last week at the zoo, i didn't have the guts to ask this guy where he got his shirt. i regret that. i imagine it would've gone down like this:
me: excuse me sir, where did you get that shirt?
rhino enthusiast: what shirt? this one? my rhino shirt?
me: yes sir, the one you're wearing currently.
rhino enthusiast: got it here.
me: here at the bear cage?
rhino enthusiast: no, here at the zoo. in the gift shop.
me: oh i see. can i have it?
rhino enthusiast: mine?
me: that's right.
rhino enthusiast: they have more at the gift shop.
me: cool.
rhino enthusiast: the gift shop's right over there (pointing at gift shop)
me: right.
(we stand there a minute looking at each other)
me: can i just have yours?
rhino enthusiast: no.