What are the participants of a dalliance called?

Solution 1:

What do we call the participants of this relationship [of dalliance]?

1. dallier - Someone who amuses themselves with another person or thing. He was a dallier with pretty and sycophantic women.

2. flirt - A person who behaves in a flirtatious manner. She wasn't a flirt; she never edged up to sex and backed off giggling.

3. coquet - A man given to flirting.

4. coquette - A woman who trifles with men's affections.

5. fornicator - A person who commits or indulges in fornication.

6. fornicatrix - A woman who commits or indulges in fornication.

[All definitions and example sentences sourced from the SOED]

Most synonyms of fornicator and fornicatrix are derogatory and refer to women, which is strongly suggestive of the sort of cultural history we're born into.