I'd ask her why he showed her his penis and then decide what to do about it.
no girls do not have a penis
"My penis"
It means you are curious about the opposite sex. This is very normal.
it means that your unattractive and stupid.
Do not show a girl!!!!!!!!! That would scare a girl and make her disgusted!
If a girl with braces sucks your penis properly there will not be a problem. Basically she should only be using her lips, tongue and throat. Some guys do like having their penis raked by the girl's teeth, but it still should not be a problem.
log into a search engine and type in 'penis' you should come up with about 5 billion results.
You can marry someone if you've got a 1 inch penis. A girl should marry you cause she loves you not for your penis size.
The thought that girls like guys with a long penis is generally wrong. To most girls, penis size makes little to no difference. As a guy you can imagine your penis size to be about as important to a girl, as the girl's breast size is to you. Do you actually care whether a girl has a big chest or not? Most guys don't. So why should girls care whether you have a big penis or not?
After a girls period! Unless you like to have bloody vagina lining on your penis during sex.
Wash it thoroughly as soon as you can afterwards, as you should anyway after sex.
Only when you are in a long term relationship with her. Otherwise it is not proper.