He takes a long time to get aroused and when he does he sometimes lose it in the middle of sex and still no climaxsoft balls?

It's called Erectile Disfunction. He has a hard time getting it up and can't keep it up for a reason. Those reasons might be because he's on drugs, he smokes, has Diabetes or some other medical probablem that prevents him from producing a fast and hard erection. To improve this condition, he needs to seek medical assistance.

GO GO GO!

it might also be a problem with his mate. if he has an uncomfortable feeling towards her , if he suspects that she is having an affair and is not sincere, that will cause problems. etc.... a clouded , worried mind will not produce a lasting erection.