things to squeeze into the fic

(around the time Sonic pulls out his penis) 
..he became more aware of the pressure building in his groin as he anticipated relieving it soon.
[as he pulled out his penis], the pressure applied by everything he'd been holding in caused his penis to harden a bit.
[as he starts to pee, it hardens a little more and no longer requires him to hold it]
[he feels immense relief and stretches as he pees, puts his hands behind his head and closes his eyes]
[Tails notices his eyes closed and sneaks a look, gets a perfect view and admires the powerful stream and the size of his cock]