It is thought that when sex is not done for a long time, the desire increases. In fact it is not so. When you do not have sex, you no longer think about it or expect it. This is not necessarily a bad thing, but it is important to understand why it happens.
Speaking of the biological side, regular sex helps blood circulation to the intimate areas helping you to have more lubrication.
Moreover, hormones such as oxytocin and endorphins are released during sexual intercourse, which sends the pleasure signal to the brain and increases the desire to have sex. This way even long periods without intercourse will make your desire less and sexual arousal more difficult.
It does not end here. By not thinking about sex, you focus more on the stressors that put pressure on you (such as time limits at work, children, etc.) and these are factors that reduce the desire for sex.
Below are some tips that you have heard about but need to recall. You need to allow someone to approach you to get you in the mood even if you do not feel ready for it. Small changes in relationships can strengthen sexuality and passion. So try to do something new, go somewhere together, try a new restaurant and it will take you away from the lack of desire.
Source: Women's Health