In my experience (maybe not others) YES YES sex and meth go hand in hand. I was an IV meth user for 5 years with what I had thought to be the love of my life also a meth user. When we weren't having sex he was watching porn which became another addiction of his. He could watch it for hours. The porn began having certain themes and I witnessed anger in him when he couldn't find the right flick to satisfy him. When porn or our sex wasn't enough (when I became pregnant and sober and not dirty and raunchy enough) I was in denial that he was out with others having sex. When I was high I wanted to stay home and remained faithful to him. Sad but true. When he was high he needed danger including robbing people, wild methfueled UNSAFE sex with strangers, and spending his time at anything goes drug houses . Even in his continued use it was me he "loved" and wanted to be his safe spot but meth made him crave sex and crime. He would always have an excuse why he was delayed somewhere or why I couldn't go with him certain places later to find out it was a kind of party I wouldn't have been into. Even in my heavy use I was more "square " than the others and only wanted him. In the meth world there are several people that have random sex that do not use condoms and would share a needle if they don't have one. I finally found out he was cheating when I was giving birth to our daughter and he was in a meth psychosis on a crime spree. I promise you I have been at the point you are feeling and its almost 6 years later and I'm just now finally starting to heal. It takes time but several years later I'm so happy I left. He is cheating you out of the love you deserve, time with you and the children ,money and maybe more while he is with his meth. I believe he most likely does love you but he might just love meth more right now. Do not believe a word someone says on meth. His assurance he would "never cheat or share a needle" is not valid while he is still using. His friend told you he was with two women. Protect yourself.