"Considering over half my explosions were caused by Slytherins throwing things in my cauldrons." Harry told him dryly. "I did decent enough on my OWL after all." Even he had been surprised at getting an Exceeds Expectations on it.
Looking at the vial Harry said, "I'll take it now. Better to take it earlier so I get up earlier since you'll have classes to teach and whatnot."
Which likely meant whenever Severus started lecturing him distracting him with sex wouldn't be an option. Disappointing really.