Is it really necessary to do both? I'm about to just start doing them with a trap bar. I hate doing bb shrugs, because how can I put this delicately? I like wearing sweat short when I workout and the bar rubs against my **** on the way up.

i alternate them every week
I believe the foundation of your trap development comes from heavy deadlifts, rows, and maybe power cleans (if you do them). I see shrugs as more of a "finisher" for the traps so I don't think it matters that much what type of shrug you do.
I have decent traps and have only done DLs and rows, never done cleans(I need to start though).
Like someone said, alternating always works. You don't get bored. I did DBs for the longest time, then BBs, now I switch it up randomly.
Yeah I wouldn't even ask this question, but since the bar is so close, when I bb shrug it rubs up against a certain area.
my traps are decent no bread loaves but I use them a ton in DL / Pendalay Rows. Been lifting 5 year so or so and shrugged for maybe 3months.
i usually just farmers carry around the gym while holding my traps for a couple of min each shoulder day
Try doing BB shrugs behind your back. Hits the traps from a different angle and avoids the rubbing on your **** and balls.
i like to sit on the bench with heavy dumbell in each hand and do shrugs
I like to do smith machine bb shrugs. Keeps the barbell from rubbin up agaisnt your piece.
Same reason I do not like BB shrugs.
As suggested behind the back, is a nice change up. I found since really going heavy on DL, as stimulated trap growth, plus heavy DB shrugs.
I do db shrugs on shoulder days, and DL on their own day. After db shrugs I usually follow up with shrugs on a cable pulley. Really finishes them off, plus stepping back a little alters the angle hitting the trap a little differently. I also alternate my grip between narrow and wide. I use either a ez-bar or lat bar attachment.
I shrug at the top of a deadlift rep, and jostle my junk doing so. Just deal with it, unless it gives you a boner and everyone notices LOL
True story:
I give a f**K!!
I did shrugs with the trap bar yesterday and loved it. I prefer doing them with the trap bar now more than the barbell or dumbbells. So, I'm just goign to do them with the trap bar from now on.
I usually stick to DB i feel like sometimes i slack with my left side being right handed when i do BB so i always do DB i feel like i they work better atleast for me.
I know exactly what your saying with the junk problem its hard to focus when you keep tattling it around.
I was in shame because I thought I was the only one who experienced this problem. So this is what it feels like when doves cry.
Also, to remedy it when I do BB shrugs is I bend my legs a little bit and slide the barbell up. Gravity takes the.... Shvantz out of the way.