The best way I can explain it is like how the back of a Playstation or other console when it gets hot and the air coming out of it is hot. Combined with a slight armpit smell. As long as I have been on the internet, I keep reading about how women smell “fishy” down there, and I was always confused by that. Am I just weird?
In my experience, most don’t smell fishy. The scent you’re describing sounds pretty normal. Smell will vary person to person, and is largely dictated by vaginal flora and hygiene. Your crotch is essentially an armpit, so it should smell a little sweaty and gross after a long day, just like your pits. Putrid/fishy smell is typically a sign of abnormal flora, which can be caused by bacterial vaginosis or a yeast infection.
If your cooch has always smelled that way and you bathe regularly and don’t have any weird discharge or symptoms, don’t worry about it. You’re totally normal.