Sexual orientation can be considered a choice because there are some who choose to love another person of the same sex even if they did not think that they would get attracted to the person before. There are also some who feel that they are attracted to someone but they try not to act on it.
Some studies show that people have the tendency to become attracted to people just like them which means that they are more inclined to become attracted to people of the same sex. However, society has already dictated that men and women should love each other. This may have made a lot of people confused.