Fellatio is a sexual practice in which one person stimulates another's penis using their mouth and tongue.
It can be part of foreplay or a form of sexual satisfaction in itself. Fellatio can involve different techniques, such as licking, sucking, kissing, biting or taking the penis in your mouth.
Remember that you can also play with the mouth of a penis even if it's not hard.
It is important to remember that fellatio can carry the risk of sexually transmitted diseases and should therefore be practiced with caution and protection.