Why are you so one-sided?
Someone hit the head of weight loss, and in his head only diets, only the gym - let him, this is his life, the main thing, so that others do not bother with this. The other person understands that when his exchange of leanness can beined by eating all his life only a salad leaf a day, and does not want to go for it - his right.
The same with socks / sandals, wear - wear, don't wear - for the sake of God, your choice
And the fact that you are someone because of discrepancies on these, as I see, very fundamental issues you will not consider as a sexual object, so maybe a small loss?