I like the shields best so far because they symbolize protection.
Better even would be bells because they may symbolize bell-ringers.
I leave the design with others as there are clearly more talented.
So do condoms. Which protect bell-ends, so maybe combine them both and have some little rubber johnny icons:

Strange reply. To me, and most people, the difference between condoms and bells are clear. Most social media platforms also use bell symbols. Have you ever mistaken those for condoms?
Not that it
must be bells, but like everyone else here I'm just adding suggestions.