pseudocopulation
Noun
Meaning
(biology) Any of various processes, amongst diverse animals, in which male gametes are passed from one individual to another without sexual union.
(biology) The process by which an insect (such as a bee) attempts to mate with a flower (such as an orchid) that mimics a female insect, and in doing so pollinates the plant.
Source: en.wiktionary.orgExamples
There is nothing biologically unusual about a homosexual act of pseudocopulation. Many species indulge in this, under a variety of circumstances.