The user’s girlfriend, who is more experienced sexually, recently expressed a desire to introduce a third person into their private relationship dynamics. This request came after the user had previously expressed some insecurity about his girlfriend’s greater experience.
The user immediately and firmly rejected the suggestion, stating clearly that he would never agree to this arrangement. He set a firm boundary by warning that if the topic is brought up again, he will end the relationship.

AITAH for telling my gf to never bring up threesomes again?



In the field of relationship dynamics, Dr. Remy Ward is known for noting, “Clear, non-negotiable boundaries, when stated calmly, form the bedrock of trust, even when they define a point of difference.” This situation hinges entirely on the clarity and severity of the boundary established by the original poster (OP) versus the validity of the girlfriend’s stated desire.
The OP acted decisively in communicating his limit, prioritizing his comfort and perceived relationship structure (monogamy). This avoids the common pitfall of passive agreement followed by resentment. However, issuing an ultimatum—threatening to end the relationship if the topic recurs—escalates the situation significantly. While it enforces the boundary, it also removes space for discussion about the underlying reasons for the girlfriend’s request (e.g., curiosity, dissatisfaction) and can put undue pressure on her.
The girlfriend’s request, while potentially rooted in curiosity or exploration, directly clashes with the OP’s non-negotiable terms. A professional approach would suggest that while the OP is entitled to his boundary, if this desire represents a fundamental incompatibility in sexual needs, the conversation should shift from ‘what we are doing now’ to ‘if we can continue long-term.’ The immediate ultimatum, while protecting the OP in the short term, makes future conflict resolution exceptionally difficult.
REDDIT USERS WERE STUNNED – YOU WON’T BELIEVE SOME OF THESE REACTIONS.














The original poster is currently navigating a serious relationship conflict where his firm boundary regarding sexual exclusivity has been directly challenged by his partner’s expressed desire for an open dynamic. His emotional position is one of insecurity amplified by the request, leading him to issue an ultimatum to protect what he perceives as essential to the relationship.
The core question is whether the girlfriend’s desire for a specific sexual experience justifies pushing past the partner’s absolute ‘no,’ and conversely, whether issuing an immediate relationship-ending ultimatum is a fair response to a single request that violates a fundamental boundary.







