Give him a 'shot'

"Actually," you say, feeling yourself reharden, "I do have an injection I can administer to prevent infection."

"Oh, cool." Paul said, pulling up his sleeve, "Go right ahead."

"It has to be administered anally," you tell him, unzipping your pants again.

"I don't know…" he shifted, looking away, "I ain't gay."

"You don't want to kill yourself just because of a little sawdust?" You ask, pulling out your cock, "Just let me fuc- give you a shot, and then I'll give you further details for a scan."

Paul grimaced, before giving in. The hunky builder turned to the bed, and walked over, undoing his belt. He stood, and shimmied out of his below waist clothing. Placing his hands on the bed, he stuck out his arse, displaying it for you.

"Have you had anything up your arse before, Paul?" You ask, applying some lube to your cock.

"Never." He simply stated.

"Oh well, better lube you up!" You grin, dropping to your knees.

You inhale the musky scent of his arse, the hairy, sweaty crack providing an intoxicating smell. You lap him up, clearing all the sweat he's built up. You dig your tongue into his hole, loosening him for his inevitable fucking. Inhaling his musk, you pull off, and prepare to break in his cherry.

"Just relax…" you say soothingly, petting his shoulder as you rise from your knees.

Taking your dick, you guide it into the large man's virgin hole. He inhales sharply, going rigid from the intrusion.

"Relax…"

You keep repeating it, slowly pushing more and more of your rod up his chute. Your words have an affect on him, as the man nearly falls from how relaxed he is. Once your feel your pubes scratching his furry cheeks, you begin to retract your cock, before pushing back in. Building a steady rhythm, you begin to play with the man a little more. You bring your hands up his shirt, and pinch his nipples. You roll them around, squeezing the little buds. His nipples stiffen, and you begin feeling his meaty pecs. You are astounded by their firmness, and how big they are. You play with them, groping and poking them. Paul grunts a little, and you notice his pole has risen to full mast. Reluctantly pulling off his man tits, you bring your hands to his shaft. While slightly smaller than yours, it has got to be one of the thickest penis' you've ever seen. Jerking it slightly, Paul thrusts into your hand, obviously enjoying the beginning handjob. Your other hand ventures to his sack, rolling around the impressive balls. He groans, the touching exciting him. While jerking him, you focus back to administering him his 'shot'. You begin thrusting faster, feeling his tight hole squeeze your cock as you fuck him. You gradually build up speed, beginning to slam into the hunk. Paul moans at the pleasure in both his cock and arse, moving slightly as well. As you pound his hole, you prod his prostate, causing a loud moan to be extracted from the man. You jerk his dick to orgasm, as he shoots his hot load all over the sheets. His arse tightens around your pole, stimulating it to its own blow. You cream his hole, coating it white in your second orgasm in minutes. Breathing heavily, you pull out, just as your dick begins to finish shooting. You quickly put your cock back in your pants, and zip up, regaining a professional posture.

"I think now, you're free to go!" You smile to the worn out stud, "Here's the time you should go in for your scan, but apart from that, you'll be fine."

"Thanks doc." He smiled, rubbing his leaking hole a bit in pain.

"I think, though, you should come back next week in case." You say, looking sincere, "We don't want anymore accidents."