Non-lubricated or flavored condoms can and should be used during oral sex to protect against STDs . Among the options are spermicidal foam, cream, jelly, the diaphragm , or the Pill , all discussed under Safer Sex . Put the condom on the erect penis before it contacts any mucous membranes or genitalia. Unroll the condom approximately one half inch, then place the open end over the erect penis. This extra half inch should hang loosely past the head of the penis to catch the semen.
Many condoms also have reservoir tips which serve the same purpose.
Squeeze the end to make sure no air is trapped inside. The condom should then be unrolled down to the base of the penis. When unrolling the condom, be careful not to puncture or tear it with your fingernails. After ejaculation, the penis should be withdrawn before the erection subsides. When withdrawing, one should be careful to hold on to the rim at the base of the condom and be careful not to spill any semen on his partner.