I agree, Jane222. Sometimes I just prefer for him to be on his tummy, ready and waiting for me to do what I need to do.
Other times, however, I like for him to protest just a little. Starting from the very beginning when I tell him he feels quite warm ("I'm fine," he'll insist), and several times while I talk him into lying face-down onto the bed and giving that moneymaker over to me so I can get that temp. I see it happening a little like this. Of course, he insists he's fine as most young men do. I tell him we'll see about that, and to get into bed so I can take his temperature.
"Not that way," I tell him when I come to find him on his back. "Flip onto your stomach for me." He utters a couple of no-way's and you've-got-to-be-kidding-me's, but he can also tell I'm not kidding when he sees I'm holding a long, red-tipped glass thermometer in one hand and a small jar of vaseline in the other.
Reluctantly he rolls over and moans a little. I tell him to quit being such a baby as I tug his boxer briefs down past his hips and give the thermometer a few shakes. "You are so silly. It's only going to take a few minutes." He lifts his head and looks over his shoulder as I drag the bulb end of the thermometer through the slickness of the vaseline.
"Hold still," I scold playfully and give his behind a little swat. "Now I need you to relax - take a breath." And when he does, I pull one butt cheek aside with my free hand and slowly... starting with the gleaming, lubricated tip... slide it gently into his rectum until it reaches that stopping point. He tenses up slightly as I do this.
"Doing great," I whisper as I rub the small of his back, the sides of his butt cheeks, the insides of his thighs. I do this even though I know he doesn't hate it one bit.