I concur, HBerg! I've used a boner phone for years for both paid & unpaid dalliances. Sometimes MLs add their personal #s to my phone or more recently, add me through WeChat. Having the boner phone lets me sleep much easier at night. The wife knows of the phone but believes it is used for my small business. i'd be fucked if she ever got into it, so of course I keep it secure through a PIN and switch it off when I don't need it. In terms of facebook, i refuse to put my phone # in there and would certainly not be turning on the 'search by phone #' feature.