Extremely unlikely.
At 23 a person has finished growing and will not get taller.
Yes, you are both single adults and do as you wish.
At 23 you are not a boy anymore but an adult and the average size for a man is 5-6 inches.
Nothing illegal about dating.
Possibly it depends on where you live and if the parents allow it.
There are no laws about dating, only about sexual contact.
Yes. On top of getting pregnant, the 23 yo woman would get arrested for Statuatory Rape of the 15 yo boy (even the sex was consensual).
NO
usually 19-23 kgs.
Course. My brother was 18 and he's was dating a 23 year old. It's only 2 years different.
23-24 seconds
No, it is against the law. The 23 year old should not be seeing a minor with any such ideas.