Don't use the phone book. I have all the numbers I use memorized. I suppose you guys all use calculators to do double and triple digit math as well?

Yes. My math ability is on par with your average Sukhumvit market stall trader.

Wow. It sounds to me like there isn't a cultural gap here regarding privacy, but a huge gaping cultural abyss. I cannot imagine ever going through a man's phone, or his email, or his wallet. I expect the same courtesy.

I think that there is more going on here than just jealous snooping, although that is certainly being done. I think I see a masterful manipulation technique at work. Won't let her check your phone? You're obviously hiding something. Let her see your phone? She'll find something suspicious. It's a lose-lose proposition for the man, and win-win for the woman. She gets you to do something, or not do something, to try to prove you aren't a player. Ah, those sweet submissive Thai ladies. Up to you, in your dreams, dude.

The trouble with my girlfriend is she codes all her contact in Thai, so I can't read them to check who has called her.