Good buddies in real life, these two mega-dicked muscle monsters enjoy swinging their gigantic hard cocks and hitting the other's, sending pulses of excitement through their entire bodies, and enhancing further growth. Derek and Len often lead new recruits through their initial cock enlargement course to show them this clash of the titans, to encourage the neophytes to grow their dicks as big as they can. Most successful cock expanders give back their time to the program, and help dispell any fears that new guys have that their dicks will get "too big" since that will never happen!