Always do an inspection before using a condom, otherwise the condom may cause pregnancy if it is broken. The specific method of inspection is as follows: blow out the air at one end of the condom, then pinch the sealed end to see if there is air excretion, if not, it indicates that the condom is intact and can be used. The process of using condoms should be noted that condoms should be worn during the whole process of sexual life, and if they are only worn in stages, it may cause pregnancy. In addition, when buying condoms, you must buy them according to the size of your genitalia, otherwise if the condom is too big or too small, it can be harmful. If it is too big, it may cause the condom to fall off and cause the possibility of pregnancy; if it is too small, the penis will feel tight and uncomfortable.