Achieve multiple male orgasm

As Johnston puts it, Squeezing Techniques "aren't a whole lot of fun for anybody" since you need to keep constant tabs on yourself and exert a lot of self control not to cum, which doesn't always work out. You will notice the male genitalia was never amputated!

Because it matters. Of course, there is another incentive for men to achieve the ability to experience multiple orgasms — especially those who fall into the heterosexual camp.