When he starts to come, there's the question of whether to swallow or not. You don’t have to: each to their own.
If you find the thought of sperm in your mouth revolting, don’t force yourself to swallow: it won’t make it any less pleasurable for him. Just make sure he withdraws in time. Otherwise let him come in your mouth and then spit it out. Have tissues on hand to either spit into or mop up any spillage.
Some men like to come onto breasts, bellies or other parts of their partner but make sure you've agreed to this first it's entirely your choice. Of course you can swallow too which brings us onto the subject of taste...
