Its read dependant. If you've got the top two pairs on the table, its pretty hard not to call a shove. Actually, its read dependant, math dependant, pre-flop action dependant...

The only way i could see myself beat is if the guy had a pocket pair and hit his set, but that happens 1 out of 7-8 times and its pretty hard for you to tell aswell. So like Pythonic said, your two pair is really good most of the time, since 2 pr is pretty much an "undercover" hand itself.

On a A-10-9 board when you have A-T, someone can be shoving with A-K after you bet it, for instance.