LOL it's so funny how with each generation the yaoi bubble just keeps getting bigger and bigger.
If you're genuinely asking then no, it's not exactly like in yaoi. Some people do close their eyes because it helps them focus on the sensations or cuz it feels more intimate. Others keep their eyes open or switch between both. There's no "normal" reaction that everyone has.
The way it's portrayed in yaoi is usually exaggerated for emotional and visual effect rather than realism.
Btw I got really sacred for a second when I saw your nick lol

I have been curious about something relating to Yaoi/BL. Is it the same as in real life? You know how they do blow job with they eyes closed like damn! Is it really that good as it seems on yaoi?
Idk if I make sense but yeah ( ̄へ ̄)