Is there a mod or method to remove unwanted traits be it personal or sexual I am kind of confused in that area of the game. Example getting rid of Clingy trait it doesn't show up as removable in the Lab.
Toxicity is a waiting game, it goes down (edit: 1 to 5) each day. Though there are enchantments for underwear to help, it's kind of a late game thing as they are rare.
The only source of enchanted underwear is Umbra exchange. But as I said it is rare, the chance of getting the enchant you are after from there is less than 1%. Unless you get lucky early on you are probably better off not worrying about getting one.
That is probably the result of magic toxicity mutations. If you used too many potions on a slave, they can can gain traits by mutating. Otherwise it would have to be the result of a mod, as there is nothing else in vanilla which would add that trait.