My son is promiscuous and I think his mental heaIth caused it

So I have 17 year old twins. Girl twin is in college and boy twin is a senior. My son tried to end his Iife freshman year and spent majority of his time in a ward. He would have been on the same path as his sister but that slowed him down. My son still has depressīon but he doesn’t try to do anything to himself anymore. His depressīon now mainly just comes from sadness and low self esteem. He is not ugly though, lots of girls try to date him. I guess it’s one of those things where you become your worst critic. Two days ago I overheard my son on the phone with a girl. She made a gross comment about his body that I don’t wanna repeat and he responded with flirting sexualIy. Later that day I stopped my son before he went to work, he got irritated because he was in a rush and I told him I don’t care if he’s late because we need to talk. I told him about what I heard.

I told him I need to see his phone. He told me no because he pays for his phone. I told him that he’s a minor so I have the right as a parent to check it. He handed me the phone and I started talking to him as I scrolled. I went through his conversations with 5 girls before I handed the phone back in pure disgust. I lectured him about these activities. I told him that because of how young he is, these activities will impact him later in life. I asked him what he’s gonna do if one of these girls gets pregnant. He told me he uses condoms. I told him condoms break and he told me “If they’re used properly and in the right conditions, no not really.” So I asked him what he’d do if he got an STD such as chlamidia. He went “Well that’s not an STD but, I get checkups once a month. And again I use condoms.” I told him he wouldn’t have to get checkups if he wasn’t being a manwhøre. He said “You’re supposed to get checked regularly whether you’re sleeping with one person or a few. Married folks do cheat you know. Can I go please I’m gonna be late”

I told him that if I find out about any of this again he’ll be in a lot of trouble. I told him he’s lucky I’m letting him off the hook this time and begged him to find some self respect instead of being a fuckboy. Just because he’s a male doesn’t make promiscuity okay. I ranted to my sister, his aunt, about all of this. She told me that it may be time for him to start attending therapy again. I told her that I wasn’t sure about that. She told me that such sexuality in your teen years—early 20s is usually a behavioral issue stemming from mental health. She told me it’d be good for him if I got him into therapy. Mental health issues really do run in our family. Hell, I have depressīon. This is literally a rundown of my family:

Me- Depression and anxiety

Few of my siblings- Depression OR anxiety

Dad- Severe depression

Grandmother- Depressoon

Great Uncle- Depression

Great grandmother- Ended her Iife

I think my son’s behavior is stemming from his depression/low self esteem like my sister said. I think my sister is right about getting him into therapy. The last time he’s seen a therapist was in 2019 a few days before he turned 16. Should I make him go to therapy or should I see how he feels about it?