For me, at higher doses of test (or with deca), I can go and go and go and not blow the load (1+ hours). It's way cool at first, but some chicks can think you aren't into them.
You still have a refractory period (no insta new hardon), but you'll be thinking about sex again within 20 mins of blowing.
You're not gonna lose any more than you're genetically pre-disposed to, you just might lose it faster. Hair is overrated anyway, kiss that shit goodbye.