The butt sweat
When it's hot, humid, and sticky, a pair of tight, suffocating jeans is the last thing you feel like wearing. That being said, there's also nothing more disgusting than feeling your bare thighs touch the MTR seats when you’ve got a pair of shorts on (especially after someone has 'warmed it up' for you) , and peeling off the seats when you stand up. What's worse is when you get off the train knowing you most definitely left behind a puddle of your own butt sweat.