They are fine on the iPhone. But I don't care for the touch screens on my computer. I want a mouse!!!!
Only on phones and tablets, leave that stuff off laptops.
I've been spear fishing a few times off the coast here. Kind of hard and you have to watch for sharks but it's not bad. You can get some nice meals doing it.
Tried scuba diving a couple of times. Good fun. Don't find pleasure killing things.