Different sexual practices are combined here. She sucks and licks the cock and as soon as enough pre-ejaculate has landed on her tongue, she puts the glass drinking straw into the opening of the glans and pushes it completely into the urethra. She takes the cock, now probed with drinking straw, back into her mouth. He sticks so far inside that during orgasm the sperm can not flow off unhindered. She sucks him empty as best she can. The seminal ducts hurt...