If by "going down on someone" you mean oral sex, then there are diseases to be concerned with, especially if oral sex was provided without a barrier. For unprotected oral sex the following are possibly transmitted: Herpes, Chlamydia, Gonorrhea, Syphillis, HIV, HPV, and even Hepatitis A, mostly with oral to anal.
If someone Is Descending they are Going Down.
Z's
Someone already down is 'unten'.Someone going down is going 'abwärts', 'nach unten' or 'runter'.Someone going down on the floor is going 'zu boden'.Someone here going down to someone there is going 'hinunter'.Someone there coming down to someone here is coming 'herunter'.And finally someone feeling down is 'unglücklich'.
It means the person in question is going to get someone else to drive them somewhere. As in, "I'm going to catch a ride with Bob to the bar." It can also be used as an instruction. As in, "You'll have to catch a ride with Susan to work tomorrow."
why does my back seem to catch and nearly throw me down
No, it is not going be really to catch chickens.
yes
nope. if the ball was stuck in a tree it would be called a dead ball.
they could be falling down and needed to catch themselves on something but recovered before this was necessary
As you know, you can never "catch" a rainbow. If someone is chasing rainbows he/she is going after something he/she can never achieve.
Of he will if someone takes all his exams for him. Scroll down Jokes scroll down he will get and F
Calm down, let someone make you hot soup, and relax. I also suggest you don't go anywhere on the off chance you get someone else sick.