A new Young Sheldon season 5 promo spot reveals Mary (Zoe Perry) teaching Missy (Raegan Revord) and Sheldon (Iain Armitage) about sex. The Big Bang Theory spinoff started when its titular character was just nine years old, but now that he's 12, his and his twin sister's growth is becoming more apparent. Both have even started exploring romantic attraction, as previously seen in Young Sheldon season 4.
Sheldon had his brief infatuation with Paige (Grace McKenna), who led him to believe that the
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