I always had an "expander"...usually a short stump, but when aroused it was normal size.
Since HRT, the thing is normally always sheathed. I used to worry about it coming untucked, but now almost a year in, it's not really detectable even when it pops free. Since it's completely mushy, really nothing to worry about even when not tucked. But again, I don't normally wear skin-tight clothing. YMMV.