How to get my music to play through one headphone only on my iPhone?

I'm deaf in my left ear so it's really annoying when I have headphones in and only half of the sounds are playing into my right ear. I have an iPhone 5 with the latest iOS update and even when I change the accessibility settings from L to R for the audio balance, I still don't get all the sounds?

Twitter on iPhone showing tweets from people I don't follow?

I made a Twitter account for my grandpa so he can keep up with the grandkids. On his app on his iPhone, his timeline is showing tweets from people that he doesn't follow. A lot of them are people that I follow and people that follow me, like my friends. He doesn't know them and doesn't want to see their tweets, and I don't want him to accidentally favorite their tweets or anything. So how do I change his settings so that only tweets from people that he follow show up on his timeline?

Around what age should a girl be to have an iPhone?

Around what age should a girl be to have an iPhone? - 1

Added (1). I'm going to the 6th grade and my parents won't get me a phone, I work really hard in school and personally I think I deserve one, I'm pretty for my age. I worked really hard on 2 essays persuading them about why I should have a phone but they still won't change their minds and it makes me pretty upset, since its 2015 and you know you see everyone with phones so. :/

Added (2). Sorry, meant pretty mature

Is there any possible way to attach your iphone to your wrist or something?

So for summer i was thinking of getting a lifeproof case for my IPhone 6 in order to film underwater when i'm at the beach etc. But for example if i go on jetski or something of that sort and i don't want to loose my phone, put still film, what do i do? Is there any wrist bands for iphone or something of that sort?

How long for iPhone from Verizon take to deliver?

I live in the US and I ordered an iPhone from Verizon on Thursday night. I went with the free shipping option how long is it going to take to arrive? Is it UPS or FedEx? Do they deliver on Saturdays

Apple iPhone charger only working when in certain position?

I have an iPhone 5c and basically to charge it I have to push the charger into a certain position and position the iPhone in such a way that it keeps the charger in the right position for it to charge (I have to lean it against a wall and put books pushed up against the charger to apply enough pressure to make it charge). I reckon it is because I might have damaged the metal bits inside the phone that connect with the metal bits on the charger which would imply it's a hardware issue (if so how do I get it fixed?). However sometimes when I get it into the right position for a second a message flashes up on the screen saying "this accessory is not supported by this device" which made me think it was a software issue. I have no idea though IIm just going off guesses since I have absolutely no knowledge of technology haha.
Any advice would be appreciated

IPhone won't let me use fingerprint for purchases and not unlock?

I want to just use my fingerprint for purchases in iTunes and App Store so I go to setting and select just that one option but if I lock my phone it still makes me type in a passcode. I don't have that selected. Is there a way to just use it for iTunes and not have to type in a code to unlock my phone