Hi,
Thanks for query,
Frenulum is carrying vessel to penis.This is an anatomical position.It is an essential part to get blood in penis so penis becomes enlarged when it gets more blood flow during sexual urge.
It will not broke during first sexual act.
Anal sex also not require to circumcribe
If you have your fore skin retract over
glans easily it will not interfere in any vaginal or anal sex & you do not need to remove it..
So plan your marriage & enjoy happy sex life.
Thanks.