recently, there have been some accidents with students in Black River, where students were going into the lake to swim, but they almost drowned, and with these accidents Dumbledore made a decision and added swimming lessons to the school, to prevent more accidents from happening

James, Sirius, Peter and Remus were talking by the pool before class started, Sirius and James had liked the idea just because they could go shirtless and show themselves to the girls, Peter and Remus weren't very confident, Peter seemed uncomfortable with the idea of going shirtless because of his weight, and Remus was insecure because of his scars.

Peter: I don't like this...

Remus: Yeah I feel you...

James: oh come on Wormtail, It's not that bad!

Said James as he flexed his toned arm

Sirius: Yeah, I loved it!

said him as he catched some girls looking at his abs