Hello and welcome to HCM,
STDs can be prevented by using barrier method of contraception
However, oral sex
will not prevent the infection.
So, if you want to be safe and want to prevent the transmission of STDs, barrier method should be used.
Care should be taken to avoid any damage to the contraceptive
Oral sex should be avoided if there is risk of transmission of STDs.
There are STDs which remain dormant like herpes simplex
infection, chlamydial infection, etc.
Thanka and take care
Dr Shailja P Wahal