There'll be 15 minutes of kissing
Then you'll holler "please don't stop"
There'll be 15 minutes of teasing
And 15 minutes of squeezing
And 15 minutes of blowing my top
If your man ain't treating you right
Come up and see ol' Dan
I rock 'em, roll 'em all night long
I'm a sixty-minute man
If you mean recruiting him, do the quest for Bobby No-Nose in Goodneighbor. She's behind a door in a back-alley. There are choices to be made at the end of the quest, but they should be obvious for recruiting Hancock.