I guess what to me is one of the most amazing and still kind of unbelievable things is, well, that my 'thing' is supposed to be so much more than a 'portable pleasure instrument'
The whole society is either making fun of the penis or having a strange ego-rection about it. So many men are confused and insecure about their penises. Other feel oh so very great because they think, they have the biggest or whatever.
Also the porn-industry did not really help create a healthy view of the penis... on the contrary... it's portrayed more like a violent, hard piece of flesh to forcefully penetrate a woman and to at all costs - give a man a few seconds of pleasure... how disgusting!
And then, Karezza and Tantra tell you, that the penis is supposed to be a 'healing instrument' - now that's something!
A though to getting used to. At least a positive one...