Responses

I think that genre you described are closer to shounen ai rather than yaoi though...

Yaoi is explicit bl, so if it goes beyond 1st base it's yaoi. In this case, they didn't have penetration but they did have that lovemaking scene at the end.
Shounen ai is bl but more innocent, so usually not going past a kiss or if there's a rare sex scene it's usually more toned down and glossed over.
Tagged as Yaoi without sex scenes..