Dude, the proper way would be to
Get hot together, strip down, stroke it a bit for him, give him a hot enticing kiss that will leave him wondering what is next, then proceed to kiss him trailing down to the cock area, tease him a bit by rolling your tongue around his head and kissing the tip, give him a famous Bj for a bit, then kiss him all the way back up again, and hop on him and ride that shit!
To stay fully clothed and give a standard hand job is basically a waste of time.