Couldn't you just use your own spoon and tip it onto their plate?
Loads of different dishes and flavours to try in a good indian, I know what I like too, but sometimes someone orders something I haven't tasted before.
Decent Indian restaurant with a decent bunch of people and I would expect at least some offers of a spoonful taster of each other dishes that have been ordered. Typically someone who doesn't normally order a hot curry having a bit of sauce off a hotter dish to try it etc.
All this nothing of...