I do not know why the armpit but that is how they take the basal temperature.
I never feel cold or hot, I always adjusted. Four months ago I started feeling cold and my skin got very dry, I got angry a lot etc. Once I took one drop of Iodine my problems disappeared. Today my skin is admired by all around me. They ask me what kind of soap and lotion I use. I do not use any lotions or soaps.
My message to you on the relationship forum should be on page 34 and 60 days ago. It is under your question about your BF. Basically he should do liver flush.