Wearing lacy underwear occasionally is fine but wearing them on a regular basis is certainly not a good idea. Synthetic fabrics especially the ones with irregular edges can cause itching, burning and irritation.
6. Heavy bags
Shoulder bags are a huge issue, if loaded with lots of stuff they can cause stress across the neck, back and shoulders. A heavy bag can also be a cause of change in body position and posture over time. It is advisable to switch shoulders while walking to evenly distribute the stress.