It’s worth being subtle when it comes to displaying affection, and also in what you wear. Bikinis and swim-shorts are fine round a pool or on the beach, but they’re inadvisable in towns, crowded places and around religious buildings.
Religions other than Islam are tolerated, but for safety’s sake, be discreet. Carrying a Bhagavad Gita, Bible or other non-Islamic text will be fine, but preaching your beliefs may be not.
It may surprise past visitors to the Maldives that alcohol is actually illegal. You’ll likely find it in most resorts and other tourist hotspots and have no trouble consuming it there, but outside of these havens the rules are very different.
Perhaps most important of all is to be aware that taking shells from the coral reefs is strictly illegal. Diving is an activity that many experience due to the beautiful scenery that’s to be found underwater on the islands, but removing a souvenir from this fragile habitat can land you in serious trouble.