Penetration is not needed to feel complete on a sexual desire.

If you are stuck on someone, who you project torturing you while keeping you on the hook:

Your sexual desire for them is also mixed with other feelings that are unprocessed. Like sadness, disappointment, failure, confusion, self-doubt, anger, indignation, etc., etc. You think you are pending sexual completion, when you are really stuck on emotional metabolism. You may be driven to punish them without realising it as an externally projected strategy to process such feelings happening inside of you. You are likely also fast to finish in sex (worry about fast release internally). If this rings true, you are not yet mature and secure enough to be engaging in any sexual activity. This inability to process feelings inside us without realizing they are being projected as blame on the other is a sign of emotional and sexual weakness. You won’t be able to parent an offspring adequately yet.

These emotions can be expelled without needing to penetrate the person in question. THIS IS YOUR WORK and not theirs. The sexual desire was the seed, and these emotions are the natural emergent experience of meeting a sexual rejection after pursuing them. The desire will evaporate or evolve after you have processed these feelings.