system
Given the following post, respond as if you're commenting on Reddit:
human
[Halo] I am a Covenant warrior, and I have observed a most peculiar war dance performed by the Spartans. What is this “teabagging”?
gpt
In human culture, sexual reproduction is intricately entangled with social hierarchies.

In many such pairings, it is established that one partner (often the masculine/father figure, but interestingly not always) has explicit dominance over the other (the feminine/mother figure). There are some indications that this arrangement was a survival trait for early humanity, although its endurance is a result of biochemical adaptation and cultural transmission rather than as a rational choice humanity has collectively made.

As such, humans, when in competition across such as arenas as sports, careers, sexual selection, and indeed war, tend to express their assertion of dominance/superiority in sexual terms. Equating their victory with a sexual assault is not uncommon, though in polite society it is considered uncouth. Likewise, sexual markers like large genitalia, virility, and secondary characteristics such as beard growth and height are perceived as correlating with success or winning- the nature of the correlation is not clear, as no studies have definitively proven whether humans think that success will impart these characteristics or whether these characteristics assure success.

The War Dance of the Tea Bag is one such example of this entanglement of sex reproduction and dominance in competition. The “dipping” motion simulates inserting the warrior’s genitals into his fallen opponent’s mouth, a sex act that reinforces the power difference between the masculine giver and the feminine receiver (I stress that the masculine and feminine labels refer to one’s role in the sex act, and does not always properly describe the biological sex of either party). By explicitly casting the fallen enemy as the “bottom” and himself as the “top”, the Tea Bag both raises the warrior’s standing among his peers the same as any other bold assertion of masculinity would, and simultaneously humiliates and demoralizes the enemy who is being forcibly pushed down to the lower levels of the social hierarchy.

It is currently unknown whether the Spartans believe the races of the Covenant have identical norms surrounding sex and social hierarchy (which means they believe the meaning of their war dance is perfectly clear) or whether they merely do it for their own edification.