What does it mean for a guy to "finish"? I don't really understand.
Most Helpful Opinion
Finishing is important. It means to come but it could also mean to finish a sex session "cum on her face" or get off somehow.
In terms of blow jobs, finishing for me means coming in her mouth and her swallowing. I don't bust on her face unless she asks me, which some girls enjoy. Some guys I know only like to come on a girls face. I know girls don't believe this but some girls like to feel dirty in a naughty but nice way.
You are under 18, so I'd practice this stuff a little bit because it is important in relationships to please a guy sexually. He will be so much better to you and adore you if you can get him to finish often.