Last night's highlights saw some of the housemates discussing shaving and waxing their private areas.
This led to Tom making a revelation about once shaving a certain part of his body, prompting Ellie to respond by repeatedly poking him in the bun.
"Is that it?" Ellie said.
"No, that's near enough my bumhole, get off," Tom responded.
Ellie continued, with Tom shouting: "GET OFF!"
"Is it nice?" laughed Ellie, as she continued.
"F**k Ellie!" snapped Tom.
"I like it when you talk dirty," Ellie responded.
While Tom didn't appear to take the touching too seriously, many watching did.
"So if Tom poked his finger up Ellie's a**ehole and he would get chucked out? @bbuk #BBUK" one posted.
Another added: "Ellie should be kicked out for fingering toms bum. If bloke had done that! Such a lame series #bbuk"
"Imagine if Tom had done that to Ellie and Ellie said 'I don't like it, stop it' and then he carried on with everyone laughing #bbuk," agreed a third.
"If Ellie was a man... she would have been thrown out or at least warned for sexual harassment .. she did it with Lotan, now Tom.. #bbuk," continued a fourth.
And a fifth user pointed out on Twitter: "Classic C5 showing the #DisrespectNobody advert after a bit of casual sexual assault on #BBUK."
Big Brother 2017 continues nightly on Channel 5.