Alex's pants drop down from his thinning waist, and they both see that the fur has spread down to cover his thighs and crotch. But while Tom's male sexual equipment has actually grown as it changed, Alex's testicles and penis are shrinking rapidly!
Alex grabs at his crotch in horror, but in moments his balls are gone and all that is left is a small nub between his legs. Tom is having trouble standing now, becuase he has kept changing. He falls forward, catching himself on forelegs that used to be his arms, and finds his nose very close to his freind's crotch.
What is that wonderful smell? It is coming from behind Alex! Tom feels himself start to harder, his bony pink shaft pushing out from its sheath as his balls begin to swell.