Allergic reactions to latex condoms are rare, but they do occur. If there is not a receptacle end, be sure to leave a little space between the condom and the end of the penis. Otherwise the semen may push up the sides of the condom and come out at the base of it before the penis and condom are withdrawn. Be sure there is not any air between the penis and the condom. This can cause it to break.
Some people find it helpful to unroll the condom a little before putting it on the penis.
This leaves plenty of room for semen collection and prevents the condom from being stretched too tightly over the penis. After ejaculation the condom must be removed from the vagina. The best way is to grasp the condom at the base of the penis and hold it as the penis is withdrawn. You should always dispose of condoms appropriately. Although flushing a condom is sometimes recommended, keep in mind that it may clog plumbing.