If your condom does not have this reservoir, squeeze the tip of the condom to remove air and create a reservoir. If your penis is uncircumcised, pull the foreskin back before putting on the condom. The condom should unroll smoothly, with the rim on the outside. If the rim is on the inside and you struggle to get it to unroll, it's upside down. If you feel a condom break while having intercourse, stop and withdraw immediately.
Condoms are more likely to break during anal sex than during vaginal sex.
For this reason the FDA and the United States Surgeon General's office do not recommend condoms for disease prevention during anal sex. After you ejaculate, hold the condom close to the base of the penis and carefully withdraw. Immediately discard the used condom. Never use a condom more than once. Discard a used condom immediately after use.