stp help

Anyone know how not to have your urine stream sound "girly".

Context: I was using my stp like usual when a group of males commented on how my stream sounded female like.

To which I got very self conscious about. My main fear is if I try and get my stream to be strong I’ll over fill my stp. Of course the men who made the comment don't know I am trans.

So now I try and just go to the washroom when no one is there. I was getting so confident with my stp and now this situation has set me back a lot.