Rocky, when he was a kid, he played at being a nurse, so now, even though he knows that this is no longer just a game, he continues to enjoy it in the same way.
Oh and I am like his guinea pig, at least it was not for him to learn how to perform an intramuscular injection, that would have scared me!

Pic for Rocky, as Patreon reward (Thank you!)

Digital. Photoshop

https://www.deviantart.com/pandapaco/art/Blood-Pressure-855162500