Food? Pretty sure food is essential hahaha

You mean essential things that you need to prepare for clients who would book for incalls?

Do I need to buy latex gloves? I'd say yes. It's always better to keep one around. You'll never when you'll need it

Essentials for what exactly? 

Do I need to buy latex gloves? I've seen that floating around the forums... any other tips and pointers will be appreciated xxx