I'm losing weight, but unlike any other time I've purposely lost weight, I'm doing it (for now) through diet alone, no exercise.  I'll get to exercise eventually, but for now my diet is working great, so I'm sticking with it.  I don't need the appetite boost that exercise brings just now.

The other thing that exercise does is make me constantly horny.  When I had been exercising regularly in the past, I would masturbate 2 or three times a day and still feel like I could go more, though my cock didn't always agree.  I'm finding that through dieting alone, I'm not getting super horny all the time.  In fact, I think I masturbate less now than I did before I started my diet.  Not out of lack of energy, but just not feeling like I need the release as often.  It's a bit of a shame, because as I lose more weight masturbation becomes a whole lot more fun, but I can deal with it.