It also, leaves a space at the end for the cum. Roll the condom down as far as it will go. For anal intercourse, use lots of lube. Lube is great for vaginal intercourse, too. Add more lube often.
Dry condoms break more easily.
Don't leave the condom in bed with you. Throw it out. If you have intercourse again, or with another partner, use a new condom. Never reuse a condom or cum twice in the same condom. Guys, practice putting on a condom in a comfortable place where you have plenty of time by yourself.