All joking aside, it could be anxiety based.
-Is it only on your heavier sets?
-Do deads or any other lifts do it?
-Do you take any pre-workouts/stems
Could be your usage as turbo
-enlarged prostate
-low estrogen
-can you see if it lessens while being fasted
Could be "stress incontinence" as brick stated
-is it worsewearing a belt
-does it happen sneezing or caughing
I would definitely have a prostate exam,,,could be enlarged.