Would you let your significant other track your every move?

Selena and her fiance have their Apple ID synced together, which made her realize her fiance can track her through the "find my iphone" feature. She was talking to her friend about it and her friend thinks she is crazy for letting him monitor her every move! She thinks it's a violation of Selena's privacy, but Selena says she's got nothin' to hide!! Would you mind if your significant other had a GPS tracker on you or do you think it's a violation of privacy??