You, though, are going to have to learn to be spectacularly discreet. Perverts are not a protected class, and people with little exposure to these things haven't the faintest idea how to separate the lurid and usually deadly "whips and chains" depicted on Law and Order from the usual run of kink-sex reality, which is slightly less dangerous than golf thanks to fewer lightning strikes. Should they discover that one of those whips-and-chains people is gasp teaching the children, I can assure you that they will not be interested in becoming educated about it. They will be interested in having you drawn and quartered, and not in a fun way. Go ahead with your plans, but do shut up about it.
Andrea is home with the kids and going stir-crazy. Write her a letter! Ask her a question! Send her your tedious e-mail forwards! On second thought, don't do that. Just ask her a question.