Blacktail51 said:
I was just wondering if there was a way to blacklist posts of males performing fellatio. I am new to blacklisting and it's intricacies and I'm unsure of how to blacklist this particular thing.

In the blacklist, you can also use certain combinations to be able to see images with a tag ONLY under special conditions as well as the standard way of using it to remove things.

For example: domestic_cat -domestic_dog is a combination that will give me cat posts ONLY if they also have dogs in it. And you can do it for multiple things on the same line in this case.

Some examples of this + some standard suggestions

fellatio -female_penetrated -intersex_penetrated -ambiguous_penetrated
fellatio male/male
fellatio -male/female -intersex/female

Mind you my first and third may give you some false positives. The ones @Clawdragons suggested were quite good