Something very practical that you can find in all profiles is a function where you can write down information and the phone number of the profile you want. This feature is very easy to use.
When you access a profile and click on the star to add that profile to your favorites an icon will appear above the photo, the typical one of the little leaf with the pencil. If you click on this icon you can write personal notes and even add a phone number. These notes are personal and completely private. By the way, when you write down the phone number, a phone icon will appear, allowing you to call the contact directly.
This feature is free and is available on MachoBB.com, Trans4men.com, Bakala.org, KinkySafe.com, BearXL.com and GayZinLove.com.