Ему казалось, что он первый открыл

Ему казалось, что он первый открыл это удовольствие, и он наслаждался своим открытием.

Results (English) 1:

It seemed to him that he first discovered this pleasure, and he enjoyed his discovery.

Results (English) 2:

It seemed to him that he first discovered this pleasure, and he was enjoying his discovery.

Results (English) 3:

It seemed that he was the first opened this pleasure, and he speaks to its opening.