Not all guys do, but those that prefer it generally do so because they can penetrate more deeply.
This doesn't mean you have to do doggy style all the time, of course. It's not like other positions are somehow bad or lesser. Variety is the spice of life, after all. If your guy keeps insisting on doggie, look up a few positions to try, and experiment.
Well I like it because I like looking at a woman's butt...
I am a woman who loves it!! Favorite position... gets me off EVERY time. I don't understand why women are so disgruntled by it.
Me too...
I love doggy-style sex! I have it every night with my boyfriend! He says he enjoys looking at my butt and it feels good!