What do guys like when you give them head?

well.....I've given my boyfriend really good head before and he sed im great at it but still he hasnt c*m for me and I've gone for as long as 50 minutes.....so im not sure what else I can do. would giving him a crazy lapdance turn him on enough to make him c*m quicker? or do guys like it when you play with their balls? haha lol I know these questions are weird but I just want to please him and so far...the only time he has ever c*m is when we have sex which weve only done a couple times.

If you want to know what will please him, you will have to ask him. We can't read his mind, and men don't all like the same things. Men are different and have different likes and dislikes. Some men would like a lap dance, others would not. Some would like it if you played with their testicles, others would not. So you'll just have to experiment or ask him what he thinks would make it go faster.