At the Gay Sex Positions Guide, we define group gay sex positions by the activities—anal intercourse, blowjobs, or rimjobs—performed by three participants, which we'll refer to as participants A, B, and C.
In the fuck rim train position, participant A fucks participant B who gives a rimjob to participant C.
| Position \ Participant | A → | B → | C |
|---|---|---|---|
| Train oral (a.k.a. Blow Train) |
blows B → | blows C → | ◉ |
| blows B → | blows C → | blows D → ⋯ → ◉ | |
| Chain oral (a.k.a. Blow Chain) |
blows B → | blows C → | blows A ↩ |
| blows B → | blows C → | blows D → ⋯ → blows A ↩ | |
| Blow Rim tren | blows B → | rims C → | ◉ |
| Blow Rim Chain | blows or rims B → | blows or rims C → | blows or rims A ↩ |
| blows or rims B → | blows or rims C → | blows or rims D → ⋯ → blows or rims A ↩ | |
| Perfecta (a.k.a. Blow Fuck Train) |
blows B → | fucks C → | ◉ |
| Rim Blow tren | rims B → | blows C → | ◉ |
| Rim de tren | rims B → | rims C → | ◉ |
| rims B → | rims C → | rims D → ⋯ → ◉ | |
| Rim lanț | rims B → | rims C → | rims A ↩ |
| rims B → | rims C → | rims D → ⋯ → rims A↩ | |
| Rim dracu de tren | rims B → | fucks C → | ◉ |
| Spit Friptură (a.k.a. Fuck Blow Train) |
fucks B → | blows C → | ◉ |
| Fuck Rim tren | fucks B → | rims C → | ◉ |
| anal tren (a.k.a. Fuck Train) |
fucks B → | fucks C → | ◉ |
| fucks B → | fucks C → | fucks D → ⋯ → ◉ | |
| Fuck Chain (not seen to date) |
fucks B → | fucks C → | fucks A ↩ |
| fucks B → | fucks C → | fucks D → ⋯ → fucks A↩ |