We're talking real world effectiveness; not clinical trials.
Some methods mix better with booze. As in, you don't have to think in the heat of the moment.
Protection against STIs is important too!
For anyone who can't tolerate hormones or simply wants to avoid them.
Easy to Hide
Some women need to keep their birth control a secret.
Do Me Now
These methods are ideal for spontaneous, hot sex. Anywhere. Anytime.