Saline injections are fun. A needle prick or two and some waiting, not really any pain, and then you get a big old ball sack to show off for a day or two. For me it is more for laugh and fun; I normally do it for a play party or going out to the local leather bar. Wear my kilt and get to show them off to the other guys!
Last 4th of July I and four of my friends did it and then went to beer bust at the leather bar. Got lots of laughs and lots of fun. Last month I did it for a play party and a cute bear cub that I have had my eye on for awhile was fascinated by them and could not get enough of playing with them and me.
If you do it, be careful and have someone who knows what they are doing show you how.