Or at least I feel like a fool because I was in the middle of something and my phone cut out. Could someone please help my ignorance, or my missing the pieces, or whatever else I need?!?! 
“Why is it dangerous to do math in the jungle?”
“because if you add four and four you get eight!”
What did I miss, where is the pun, what’s the riddle, etc.
Feeling pretty dumb right now!!!
Sorry, y’all…
Eight = ate = eaten.
“you get eight” could also mean “you get ate” (or “eaten”, which would be more grammatically correct).
eta I have got to start typing faster
What’s the square root of 69?
Eight-something.
Oh christ. I figured that part out. I thought it was going to be something that i missed in the cutting of the cell phone. That was it?? That was it???
Yeah, I guess that was it…
I’ll maintain my groan response (similar, of course to that of 69)
HAAH!!!
Same reason why 6 is afraid of 7.
Because seven ate nine. 
I see where the OP’s coming from, though…it’s not very funny and doesn’t really make much sense.
Edit: By ‘not very funny’ I mean ‘not actually funny at all’.
Why is 77 better than 69?
You get eight more…
I don’t think anybody over 6 would find it funny. All an adult can hope for is a groan at the end of telling that at best. Likely they’ll get a punch in the face if they tell it at a bar, which would be a laugh for the spectators.
How fast can you have sex with someone?
68 mph. Because when you get to 69, you have to turn around.
BTW how would one spell Ernies laugh?!?
What is 6.9?
A damn good thing broken up by a period!
What’s 69 and 69?
Dinner for four.
What’s a 74?
A 69 with Massachusetts meal tax.
5% tax would only bring it to 72.
Yes, but in this case, the tip is always included.
Kkhheeeekkhheeeekkhheeeekkhheekkhheekkhheeeeee!