Should I Buy A Chilipad?

Whenever I start making a list of things I want to save money to buy for our household I always find a few extra things added to my list that I know I didn't put there.  Tonight I opened my future household purchases document on my laptop to see Hubby has added a chilipad mattress pad to the list.  Really it wouldn't be a bad idea for him. He constantly complains about how hot he is at night.  Our bedroom is the farthest away from the a/c (we have a huge window unit), but I'm perfectly comfortable at night.  He claims he's going to die if the temp outside is over 70 yet I'm quite comfortable at 80 degrees. We've battled over temperatures for 12 years now, so I don't see that ending anytime soon.