need /nēd/
circumstances in which something is necessary, or that require some course of action; necessity.
de·sire /dəˈzī(ə)r/
a strong feeling of wanting to have something or wishing for something to happen.
The very first thing to do is separate out needs from urges (desires): unless one is living as a hermit off nuts and berries deep in a remote forest one needs one’s fellow human beings for a whole raft of things (I need a shopkeeper to sell me goods as much as a shopkeeper needs me to sell goods to for example) and the most fundamental needs amount to five survival essentials ... air, water, food, shelter (if protection be necessary), and clothing (if the weather be inclement).The fact that you fail to thoroughly appreciate this makes it unsurprising that you bizarrely place the condition of not engaging in sexual acts (an act of desire) with your fellow human beings to be nearly on the same level as living without being in contact (an act of need) with them.