The method is largely ineffective in the prevention of sexually transmitted infections (STIs/STDs), like HIV, since pre-ejaculate may carry viral particles or bacteria which may infect the partner if this fluid comes in contact with mucous membranes.
This method's effectiveness in preventing sexually transmitted infections (STIs/STDs) is limited because pre-ejaculate, containing potentially infectious viral particles or bacteria, can come into contact with the partner's mucous membranes and cause infection.