私は彼のシャワーに入り、彼のお尻をファックしました。彼はうめき声を上げ、喜びにうめきました。

The shower is one of the best places to strap-on your boyfriend unexpectedly. You just need to go in with a strap-on at the ready and get him so cocky that he exposes his ass. and then enjoy inserting the dildo into his hole.