Do you enjoy sticking your finger in your pee hole to stretch it? Have you ever tried something bigger than your finger?
It may take a long time to stretch it enough for you to enjoy having his penis in your pee hole, but it is possible for him to f**k your urethra eventually if his penis is not too big.
If you are not prone to bladder infections and do not mind risking infections and perhaps uncontrollably peeing down both legs for the rest of your life, go for it.
some of us love stretching our pee holes and peeing in diapers.
I suggest that you do 99% of the pee hole stretching yourself before you ever let him near it.
The pee hole is an entirely separate and tiny hole where the pee comes out and it leads to the urinary bladder only.
The vagina is where the menstrual "blood" and babies come out and where semen goes in.
Your question explains a whole lot about why straight men are horrible at sex and have no idea about childbirth.
If his penis is scrupuloulsy clean and can fit in your pee hole, BEG him to f**k your peehole and ENJOY the amazing orgasms!