You're not entitled to anything; in particular, to any feeling from anyone else, and, more in particular, to sex in response to that feeling. I even wonder why you'd choose such a shameful feeling as pity when you could just as easily---and uselessly---fantasize about being entitled to love.
If your feelings are so important, maybe you should think of the feelings of whoever you want to have pity sex with you. Hint: it's probably not something they look forward to, because otherwise they'd be already having sex with you, and not out of pity.
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The red lake has been forgotten. A dust devil stuns you long enough to shroud forever those last shards of wisdom. The breeze rocking this forlorn wasteland whispers in your ears, “Não resta mais que uma sombra”.