Yes, immediate scenarios that come to mind:

a) LW has been shown little or no affection by their family, and is trying to meet their basic needs for affection through sex; or

b) LW was sexually abused (past tense) by an adult; or

c) LW is being sexually abused (current tense) by an adult; or

d) LW was being bullied in school and is trying to buy popularity/protection with sex; or

e) LW is in a situation where their basic material needs are not being met, and is trading sex for food.