I ended up having a yeast infection (never got tested for it, but had all the symptoms and visually it looked just like other penile yeast
infections and was irritated only when left moist and damp.) On top of having unprotected sex with my co worker, I was drinking a lot of beer / alcohol at the time, eating unhealthy, surfing a lot, sacrificing personal hygiene, and smoking cigarettes (which lowered my immune system) - pretty much asking for a yeast infection.