Here is a terrible story for your enjoyment and my pain.
Go to sea world with your two younger cousins. One of them is 5 and the other is 9.
Travel to one of the exhibits to look at the manatees.
Quickly see that one of the manatees is giving the other a blowjob. Both of these manatees being male.
Then notice that two other manatees, one male and one female this time at least, are getting it on.
Scramble for an answer when the two girls ask what the big long thing on the manatees belly is.
Look to mother for assistance.
Realize that your mom is on the ground dying laughing nearly to the point of crying about the whole thing.
Finally make a bullshit excuse that it is a type of fin.
Be more prepared when they ask what the other two are doing.
Say that they are hugging.
Drag them out of the area before anything else happened.
Have suppressed memory return when someone mentions something similar in a forum topic.
Cry.