Hairy Ass Cheeks

You can take exogenous testosterone or HCG as those things tend to increase hairiness. Otherwise there is oral minoxidil which is the active ingredient in rogaine (originally a blood pressure medication) that can promote hair growths
There are a bunch of threads on the Reddit Minox Beards sub of guys who post pics of all the body hair they are getting while using Minoxidil. Some really hot pics of hairy hands, arms and legs. Has caused me to cum so many times.