What can I do about my coworker who's very religious?

This is my first time writing, so thank you for being available! I have searched the web for any insight but haven't found much. Here it goes...

I have a friend at work who is very religious. He's not outspoken or boisterous about it, but it is generally known. I tend to keep away from talk of religion/politics at the work place — I am an Agnostic. My problem is that this friend sends text message bible quotes around holidays. They are foreboding and very fire-and-brimstone like. I am unsure how to handle these.

In the past I have ignored the messages, but at work I am asked if I received the messages where I usually reply that I had my phone off, or that I had not. To which he will resend on the spot. If I say I have received the message, then he will attempt to chat about it, to which I am resistant. I see this person almost every day, and he is genuinely a nice person, but I cringe around holidays. Doing anything drastic I feel will make things awkward, but more subtle tactics have had no effect. I don't even mind "Bless you's" or "have a blessed new year!" It's the fear and power and almighty thunder that really rattles my nerves. I feel stuck, what other options do I have?


Should I get a new IUD with each new sexual partner?

I recently had an IUD inserted. I'm not currently having sex, but wanted to be prepared as I am seeing someone who I may become sexually involved with.

My concern is I was told the IUD would need to be removed if I had sex with a partner and then changed partners later. This IUD is a 5-year IUD and the cost was quite a bit. If I have sex now and then stop for a year (or any period of time) and was to become sexually involved again with another partner, why would it need to be removed? If STDs are not an issue, does it still need to be removed?