Urgh, sorry. brain fart; I mean I took Uchicha clan occupation :P. Not Mibu (I am mixing up Tashi and Yoshi occupations). Anycase I think in Naruto the semen is laced with chakra but it's more 'overcharge' of chakra than natural reserves (in teenage hormone stages their chakras are mild overdrive and thus overproduce chakra which later calms down as the chakra lines stabilize when they fully mature). At least theory. But sex could indeed drain bits of chakra and overdoing it can lead to chakra exhaustion (or just plain exhaustion in act itself than semen drained off).<br/><br/>But indeed curious if indeed semen would hold storage of chakra and Saori develop curious relation to men's cum (instead draining plant/animals or people she just needs loads of cum to recover :P). Also I agree it can be bit weird if sharingan triggers in sex act for both parties involved, but for woman at least if his eyes are closed or not looking to her eyes, then she would not notice difference but Yoshi would feel the slow down....and also may trigger to able<em>see chakra</em>during sex act. But as it's his first time so he may think it's normal  ;D<br/><br/>