Often the physical abuse is preceded by emotional abuse and attempts to control or manipulate the victim, e.g. name-calling, telling him or her who they can be friends with, disabling the victim's vehicle to prevent them from leaving, etc.
Not the same as a love bite.
Twitard: "omg sparkle vampires iz so hawt! Edward can bite my pillows, break my headboard, and bruise my body any day!! They r just love bruises and it proves how much he loves her!!11!!1"
Twitard T-Shirt: "Bruises are love.... share the love!"
Me: *punches the Twitard in the face* "Just sharing the love"
Smart Person: "Bruises are not love. Love is respect."
" oh yes, he DID!!!!!"