In a social group, I was in a situation where I had requested help from A and when A got the stuff done, I got a message from B that the stuff was made redundant.
In a passing remark, I mentioned to B that I was feeling guilty as I felt that I had wasted the resources of A and the stuff she produced was not being utilised. The reply I got from B thrown me off a little and made me a tad wary of B.
B said, “Well, you can help A back next time. After all, friends are meant to be made use of.”