Im an AVID car texter, I do it all the time. I understand it's not the best thing, in fact it's illegal in ontario now, but in some situations for me, it's better and safer to respond to a text or pick up a phone call, than to pull over on a highway like my mother loves to do now. I'm also a commercial pilot, and we're trained to multitask, but no matter what you're doing, fly the plane first, so I bring that training into my car.. Drive the car, make sure your focused on driving, and when you text it should be a secondary task.
That being said I wouldn't dare pick up the phone while riding, Ive been in a few close calls just by looking to my right for a second, pulling out my iphone, taking off my glove, and hoping to god i spell something right isn't fun for me.
Anyways, to each their own, you can text and ride if you want, and im sure us saying anything wont change your mind, so do what you want. Just try to pay attention to riding as a priority while you do.