i just use my own phone, but that's because im single and nobody else gets to use the phone. if u have a partner u would be best with a second phone or sim.
But you single guys aren't safe either, what if there are criminal elements behind one of the ladies (you never know) or a Garda investigation into one of them, a dispossable unregistered Pay as you go sim can't be traced, a bill phone can!!
Forgot to mention for that reason I go the whole hog and have a dispossable phone and not just the sim, bit pointless if you want to hide from everyone putting and untraceable sim into a registered phone
But say in the unlikely event the lady he visit's is working in a brothel (don't know why I say unlikely becasue a lot are) which is raided and her phone seized, do you want your name on record somewhere that you called / possibly frequented this place, or god forbid, something was to happen to one of the ladies, do you want to be involved in a criminal investigation? Ok if you have information I would like to think most decent men would step forward but at least it could be on your terms. This all may seem a bit paranoid but for the sake of 50 or 60 quid you have piece of mind...