"High beams" are slang for hard nipples that can be seen through a top.
Taite was furious at the lewd comment and replied: "Don't lock yourself in the toilet... your wife and kid won't be able to find you."
Meanwhile another fan also defended Ali and pointed out that "100 per cent of humans have nipples', implying that Ali didn't deserve to be shamed for hers."
Taite and Ali have been together since appearing on The Bachelorette in 2018.
Ali had previously competed on series one of The Bachelor Australia, then again on Bachelor in Paradise where she famously declared her love to American Bachelor star Grant Kemp, only for their relationship to spectacularly implode just months later.
Back in February, Ali spoke to WHO and admitted she’s happier and more “madly in love” than she’s ever been before and loving her relationship with Taite after having moved to Melbourne to be with him when the show ended.