Finishing inside ?

Okay so this may be weird but I have no idea what to expect when letting a guy ejaculate inside. I’ve been on birth control for 6 years and never let a guy finish inside. I feel like I’m ready for it but I’m scared in the sense of I don’t know what to do afterwards lol do you just get up and just go to the washroom ? What should I expect? I know it’s kind of a dumb question but I’d like to be better prepared for what I should expect.