I never gave it any thought, but did all my injections by the calendar and at night.
That said, back in the later '70’s we had a powerlifting team. Our 242lb member who won his class in most every meet he entered (he bombed out in the Bench Press one meet), wanted to keep his AAS use a secret from his wife. We called him The White Rhino. Most everyone on the team squatted on Saturday mornings. He would have the gym owner inject 5cc of Test C in each cheek before every squatting session; yes, that was 2000mg of Test C every week. The White Rhino never complained.
The Saturday Morning Injection Parties on Saturday mornings in full view of anyone walking by on the sidewalk is another story. Those were the good ol’ days.