Most couples will admit to assisting each other with the odd bit of behind-closed-doors grooming, but it usually goes as far as squeezing a hard-to-reach pimple. But Sharon and Mike Tierney have taken their mutual upkeep to a whole new level, believing that 'the couple that waxes together, stays together.' The Sydney-based duo set aside an evening once a month to tend to all their beauty maintenance needs. Sharon, 45, trims her 40-year-old husband's eyebrows, wax his nostrils and even grooms his pubic hair. Scroll down for video . High maintenance: Sydney couple Mike and Sharon Tierney set aside one evening per month for mutual grooming . You wax my back, I'll wax yours: Sharon trims her husband's eyebrows, waxes his nostrils and trims his pubic hairs, while he returns the favours with waxing, spray tans and eyelash tints . For his part, Mike has been well trained in the art of waxing, and waxes her underarms, legs, upper lip and chin, and can even perform a Brazilian wax. The British ex-pat can also tint eyelashes and give Sharon a spray tan. Sharon admits while some women are horrified about their man seeing their lady parts in all their hairy glory, she says there's no limitations to their marriage. 'He’s seen everything, there’s nothing I wouldn't not let him see,' she told Daily Mail Australia. Being a well-groomed gentleman can be a dangerous undertaking though. Regime: While most couples may admit to assisting each other with squeezing the odd hard-to-reach pimple, but Sharon and Mike take it to a whole new level . Close cut: One hair incident involved Sharon attempting to give her husband a 'number one', and ended up cutting his scrotum . 'He says it’s for neatness,' Sharon said of her husband's preference for a 'number one' in the pubic region, 'but I think it’s to gain that precious “optical inch”.' One evening during their usual pluck, wax and clipping session, things got a little bit hairy. 'I thought we should stretch the optical illusion to its limits, so I removed the clipper guard to get the closest possible trim. We were coasting along brilliantly until we hit the scrotum and its soft, sagging, sensitive skin,' she said. The worst happened, and a poor, screaming Mike was left with a bleeding cut in the most sensitive of body parts. 'I was just trying to make his penis look bigger,' said Sharon. 'Not that it’s not big, but that’s what men want isn’t it?”' The trimmed twosome began their mutual grooming regime together 13 years ago. The couple met in London at a Pop Idol party when Sharon was on a holiday to the UK. Their fling turned into a relationship, with Sharon moving to London. During her time their, she struggled to find a decent waxing therapist. Upon returning to Australia, Sharon spent six months training in beauty therapy to open her own salon, and turned to her husband to play guinea pig. Guinea pig: Mike was enlisted when Sharon was training to become a professional waxer and needed someone to practise on . Mike was enlisted to step in when she was training up her junior therapists. 'One of the girls said her boyfriend could do it but they broke up two days before and we needed a model and I told Mike we were desperate - and he agreed, Sharon told Daily Mail Australia. 'God love him, there he was butt naked in front of my blonde, 20 year old staff, he would do anything to support me.' In business: After struggling to find a decent wax while living in London, Sharon trained and opened her own salon upon returning to Australia . 'He's a good sport and just goes along with it - which is nice because he's English and very conservative - it shows he will do anything for me.' 'I get Mike to use a bit of both types of wax. Usually strip wax on your labia is too sensitive, so I use it around the edges and use a hot wax on intimate areas, such as Veet Naturals Warm Wax.' While the sliced scrotum wasn't severe enough to land Mike in the hospital, an ill-timed bout of appendicitis did spell embarrassment for the Englishman. 'It was only an hour after getting waxed he was rushed to hospital with emergency appendicitis,' said Sharon. 'A young female doctor  said, "I'm really sorry we have to check your testicles," and he was so embarrassed. From London to Oz: The couple met in the UK when Australian Sharon was there on holiday 13 years ago . Metro man: From clipping and trimming to waxing and tinting, men are more open to beauty maintenance than ever . 'She asked what I did for a living and I said - "you’re about to find out!" She was in fits of laughter when I told her and poor Mike had all these doctors checking out his freshly waxed scrotum.' 'But in the end because all the hospital staff knew, everyone ended up taking brochures and we got a heap of new clients, so it turned it into a positive thing. Not to mention he quite enjoyed all the nurses saying "oh you’re the one with the Brazilian." ' As for their ventures 'down under' together, Sharon has now written a tell-all book to give women guidance on what's normal down there and a expose on their hilarious adventures together, aptly titled 'The Vagina Buffet.' 'I think when you put your hand on someone’s vagina it’s like they get verbal diarrhoea, they want to get comfortable with you and tell you everything, it’s unbelievable how much I've learned about people and the vagina.'
Mike and Sharon Tierney set aside one night a month for grooming regime . Sydney couple tint, trim spray tan and wax each other . Sharon's attempt to give husband 'optical extra inch' had horrifying results . Grooming began when Sharon needed guinea pig for beauty training .