His hair falling out rapidly is probably normal. While I had thinning hair from when I was about 18, I lost most of it between the ages of 35 and 40, and probably the bulk of that within about a year. I've lost very little more since I turned 40. What's left is starting to turn grey tho!
Guess what I am saying, is yeah it doesn't hurt anything but the bank account getting it checked, but don't expect to find anything out of the ordinary.
So would he respond to you spicing up the sex life at all...maybe not to the extreme of sex in traffic, but you know what I mean?
Oh yeah, the hair falling out and change of body odor could just be heavy stress.