Yes, a man with low testosterone levels will have a lowered sex drive. and this can be mistaken for lack of affection. The lack of intimacy may lead to fights, conflicts, and misunderstandings in the relationship; and understandably nothing in a relationship feels worse as feeling unwanted. So, yes, low testosterone can cause lack of affection. It can also cause a reduction in sex drive. Low T has an adverse effect on sexual function because it decreases the production of nitric oxide which is responsible for dilating blood vessels to provide more oxygen and fuel to the cells that will be used during sex. However, if you're willing to do what it takes then naturally boosting your testosterone is not only possible, but it will enhance your sexual experience 100-fold at any age! Natural supplements such as Testogen have been helping men boost their T for ages.