Ah, now that's a question. In the words of Apple you need to "think different"!
In the photo app you can open your photo then touch the icon that looks like a box with an arrow coming out of it, this will give you the option to email and will automatically open the mail app for you.
The other way, if you need to attach a photo, say if you are replying to an email, is to put the photo's in an app like Dropbox (which is free), where you can create a link by touching the icon that looks like chain links and send a link to your photo for the recipient to download at heir leisure.
I know this probably sounds a bit complex but it really isn't and we can talk you through every step if needs be.
The Archangel