Most fetishes are harmless but difficult to admit to or sustain within the context of a relationship. There's also the factor that the experience can be more fun outside of a domestic setting and even more so with a relative stranger. The element of danger involved with certain fetishes tends to disappear within an established relationship and one way to keep that thrill going is by visiting an understanding escort.
2014 in Northern Ireland:
Number of reported attacks on sex workers 70
Number of sex trafficking cases ZERO