Husband password protected his cell phone?!?

martini
My husband recently put a password on his cell phone. When I asked him why he had a password on the phone, he said it has been that way for months (this is not true). I use his phone to make calls sometimes and have never entered a password. When I said it looked odd to me he got defensive. Should I push the subject or let it go?
Husband password protected his cell phone?!?
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