Steroids is one possible reason.
hypoglycemia
Too much protien intake or hormone imbalance
It depends on.. If the girl really like the boy she probably love everything about him, even the smell of sweat.. but usually the girls don't like the smell of sweat. So I recommend you to use deodorant..
sweat.
A car may smell like sweat due to gym clothes, or other workout clothes, being left in the car.
Bad.
it smells sour (bad)
I don't know, but I like do smell another place of the girls.
Sweat, shame, and semen.
Bacteria reacting with sweat
It releases acetic acid(vinegar) as part of the curing process.
It depends; did you wash it?!
Because .. wen you drink you sweat the drink out soo you smell like alcohol