Originally Posted by Mr.Fiction

You can't control Country domains since many countries (for example India) aren't going to give you an adult trademark no matter what (the big tubes have tried and failed).

You can protect yourself in the major TLDs.

This is one strategy:
1. Register the trademark. You can do it yourself at the link I posted previously. Find the proper classes and descriptions by looking at other similar trademarks that were successfully registered.
2. Register with Trademark Clearing House to protect your trademark in new TLDs.
3. Register with one of the domain monitoring services to get notified immediately if someone registers a domain with your trademark.

If someone registers a domain matching your trademark, go after them using either UDRP or URS.

It's not free, but neither is losing your traffic to other sites using your trademark.