What does it mean by " switch or reverse couple" I've seen it in alot of comments so I was...

means they swap positions in bed so no designated top/bottom

It's when someone can top or bottom. Top means the one putting the d while bottom's the receiving partner. If one can do both, they're a switch or a verse. A reversibe couple means both guys can bottom or top.

Smooth thank u

Can u reference some manga like that?

Sauce suggestions?

https://www.mangago.zone/read-manga/playtime_with_hakdo/
https://www.mangago.zone/read-manga/like_a_tidal_wave_from_pheromone_shower/
https://www.mangago.zone/read-manga/wagging_the_tail/
u can also check out this tag
https://www.mangago.zone/tag/seke/?page=1

https://www.mangago.zone/home/mangalist/1103581/