Of course you do... The green vial seems best...

Making a snap decision you take the green vial and pour it down the nomad's throat, holding his nose to make him swallow it. By the time you do he's already shaking and sweating uncontrollably. You kneel beside him for a few seconds, but the potion doesn't seem to be having an immediate effect. Still, perhaps it will kick in in a few minutes. Looking up at the still blue sky it seems stupid, but you start arranging the nomad's tent up around him, at least it'll keep him out of the hot sun, even if a storm doesn't arrive.

It takes you nearly half an hour to get the unfamiliar tent up and secure and by the time you slip inside it the wind has already picked up the sand whipping around you hard enough to sting your eyes. It looks like the nomad knew what he was talking about after all!

Inside the tent the nomad is still shaking, mumbling in his delirium, after a few minutes he seems to sense your presence in the small tent, his eyes opening although their shot with yellow. "Chief...?"

"No, it's me... The man that rescued you... Remember?" You try and remind him, although it's obvious he's delirious.

He smiles broadly and his hand's fumble at his waist, undoing his broad desert robe sash, slipping out of it quickly to reveal a toned slim body clad only in a loincloth. "I knew you'd want me tonight..."

While you're still in shock at the sight of him stripping almost naked he reaches for your trousers and starts undoing them...