Is it normal to get a chub in yoga class?

I go to yoga sometimes with my gf and i'm chillin when all of a sudden, i feel a chub warming up. I keep to myself and my gf and we sit in the back middle. I was in the Prasarita Padottanasana position with our legs spread and reaching for the floor, back arched inward with our heads tilted upward and everyone is wearing colorful skin tight clothes. Booty was mad poppin all over the room and half the women have cameltoe, like woman!, pull your pants outta your cootie, ya got nothin to show off!

And ofc I'm wearing my gym shorts with regular boxers. Then i felt my dick slap my belly and it was kinda loud, like 3 bitches looked at me. Fortunately, not everyone in yoga is meant to be there, so i only got a chub, a half boner. I been there like 4 times and i never had my meat swing like that in class. I was able to get out of it from the next position being painful, gratefully. I told my gf about it, and she teased that she'd make sure it wouldn't only be a chub next time. I am definitely wearing briefs from now on!