At what point when dating someone do you call yourselves boyfriend/girlfriend?

i am just wondering at what point in the start of a relationship do you call it, well .. a proper relationship?
at the first date?
after the first kiss? after you have consummated? when they meet your family? etc

i am very curious to other peoples points of view

When he starts to bring me around his family and close friends then i consider the relationship to be official. Also usually he will begin to introduce me as his girlfriend and the friends and family will all comment on how he has been talking about me.

Relationship Abuse: A Turning Point