Do you need to "return the favor"?

An answer to the oral sex question

I was in Ha Long Bay on a boat trip with a bunch of other backpackers. That’s when I met the hot Dutch guy with two of his hot Dutch friends. 

We started to flirt and then ended up on the top deck of the ship together.

At that time, age 25, I’d only received oral sex a handful of times, so when he started to go down on me, I was pretty surprised. 

It was c…