@Phreak some might look down upon it but many actually respect it, and like OP says, girls find it hot because a guy is commited to something that controls him. These days all the guys are wanting to fuck anything that moves, but if I stand out with an opposing idealogy then it will either harm my image , to some people, but others will totally respect the idea.
@Fate The reason why I think I need a 'physical' symbol such as a purity ring is to remind myself of my movement. Usually I'm the type of guy who half way through a commitment cheats due to lust, I feel that this symbol will keep reminding me of what I'm commited to.