Is it ok to take a shower after lifting some weight?

my mum and yaya said that its bad for me.. i used to work out before i take a shower. which is good? taking a shower before lift a barbel or after? then why? explain it clear for me then i'll give you the 10 points you are looking for. . ciao!
Update: my mum and and my friend said that its bad for me, they said that it might affect my bones badly .. i used to work out before i take a shower. is it really ok? explain it clear for me then if you make me satisfied i'll give you the 10 points you are looking for. .

note : i need expert answer.
9 answers