Also, there is nothing even remotely "special snowflake" about telling someone that you are not comfortable with crudeness at your bachelorette get-together.
You might start trying to get people to stop calling is a bachelorette party, and switch to some term like "bridesmaids night" or "friendship night" or "bridal tea" or "bridal spa day."
POD. Or whatever it is that you aren't comfortable with. It's a party for YOU and while some brides can certainly take that too far and be selfish about it, this is really the opposite
of that. Special snowflake would be insisting on doing something far out of the price or time range of the bridesmaids, for example. Or insisting that Bridesmaid X accompany you at the spa day when she's
really uncomfortable with that.
I would talk to the "suggesting" bridesmaid directly, and also mention to the MOH or another 'maid with a leader personality to keep an eye out for this and head it off if they see it coming anyway. It doesn't have to be a big deal to nip it in the bud; but, if you're put on the spot at your party, that could be quite awkward and unpleasant, especially if somehow the others were convinced it would be a good idea.