Unbeknownst to the three of you, the chanting had already begun its work on all of you.
Your pants began to strain against the cloth as your rears inflate to bubble butt proportions, but more so with you and Mike's as Jesse already had a nice round rear to begin with, along with your thighs becoming soft and thicc. Hips began to widen and your waists thin, leaving you all with pseudo-hourglass body figures as Jesse's chest begins to deflate. Not only that, but the front of her pants begins to tighten as her female parts shifted into male genitalia, with her balls and cock now forming a cute bulge in her pants.
The chant also seemed to work subconsciously as saying "pleasure" made blood steadily flow into your cocks until you all had fully erect tents that twitched at the word. Any extra hair the three of you had, most notably any facial hair you and Mike had, shrunk away into baby smooth skin that matched all of your now girly feminine features. Even your hair began growing out like Mike's into a soft waterfall of beautiful hair locks.
Your appearances was nearly absent of any masculinity and your minds began shifting to match, as you absent-mindedly continue the chant with your BFFs on your girls' night out, not being able to think of a good reason not to stop chanting as your minds become more ditzy and dumb.