Please Respect your Jungler
Jungling is not like laning, where your primary focus is trying to farm while dealing with the enemy in front of you. Junglers have to farm, ward, clear wards, counter jungle, counter gank, gank, control drag and rift, control scuttle, and try to keep track of the enemy jungler.
If your jungler offers his/her time to gank your lane and succeeds, he/she deserves a thank you. Because there is a ton of stuff we have to do and not a lot of time to do it.
On the other hand, if you are over extended, have no kill potential, and are rudely harassing your jungler for a gank, sorry gurl. You're gonna have to deal with that fed Riven yourself.