Little sperms? where do they go?

sperm inside mens testicles i guess swim around inside the testicles. What happens to sperm that becomes too old? like after a while if it does not get ejeculated out does the body get rid of it? or does it live long term??

no flaming pls
i'll appretiate any scientific replies 2 this :)

>>11
DIE
IN
A
hospital bed at a ripe old age, after your life has been thoroughly generous to you.
THEN GET CREMATED FUCKER