Asian fascination with twins?!

I am not trying to offend anyone, I just really would like to know... I have twin boys I take to the mall that is attached to the local casino that happens to bring large numbers of Asians in from New York everyday. They literally circle around the stroller and talk and point and make happy faces at the babies. I get literally stared at as I move through but If they acknowledge me I get a thumbs up and big smile. Needless to say I only go when I know I have plenty of time, but I find it very interesting and would like to know culturally what is so special/exciting about it. Unfortunately I have not run into any who speak English to explain it. Can you?!