Some will vehemently refuse to admit it exists. Others reallydon't care about the brandbeyond it. Regardless of opinions, Transformersengaging in or pursuing interaction of a romantic nature is a well-established element in pretty much every continuity. For the most part, Transformers are observed searching for romantic partners amongst their own kind, but attraction to organic lifeforms and even non-living objects has been documented as well.
Some wonder why a species that likely does not reproduce sexually would participate in behavior that in other creatures exists as a means to promote sex and thereby new life. While a definitive answer to this has yet to be given, the question as to why Transformers become romantically involved with one another can be approached from a different angle. Transformers are a highly social species. This is shown through their very human-like society, interpersonal interactions, familial relationships, and even the fairly common practice of merging bodies and minds. If these are not frowned upon, then why should social connections of the romantic kind be regarded much differently, if at all? Perhaps there is no reason for them to engage in romance, but then there is equally no reason for them not to.
Though rather obscure, there is even an official term for two Transformers in a relationship: "sparkmates". Existing as a fan term mostly, it has been used in two official sources: the end-of-game bio for Airazor, in reference to her and Tigatron, in the Nintendo 64 version of the Beast Wars Transmetals video game; and again in Venus, a sub-feature of The AllSpark Almanac. In addition, Downshift's Cyber Key Code info appears to refer to Transformer marriage in stating that he and his lifebond partner"joined together under the Covenant of Primus".
The 2005 IDW continuity ongoing series, More Than Meets The Eye, refers to a Transformer in a committed, intimate partnership as a "Conjunx Endura". Issues #32, #38, and #56 of this series have various characters use the term "sparkmate" as a synonym.