Husband wants me to have the sex talk with our son

I haven't really talked much on here about my family and what's been on. A long bit ago I posted about my husband being asked to step down as pastor because our son had apparently been vaping and his friends mom went through his phone and found out he was watching anime porn and it was gay anime porn. Then our son tried to kill himself because a girl had recorded him and another guy being sexual and posted it on Facebook. We've been through a lot and have moved because the bullying was a lot. My husband in the hospital had to do a lot of thinking because he found our son when he took a whole bottle of pills and shoved his fingers to make him throw it up. He said to our son I would rather have a gay son than a dead son. We've moved and he's in therapy. My husband has been struggling a bit. So have I with coming around. My FIL went off on my husband because my husband was a pastor and he's allowing our son to be a "pillow biter" and told him we need to send him to conversion therapy. We have been in family therapy and it's helped us grow closer as a family and understand him better. Our son is 17 and told us he has a boyfriend. My husband looked uncomfortable but told him he can't wait to meet him. My husband told me today I need to be the one to give him the talk because he's asking questions. I said it would make more sense for him to since he's a man. My husband said he can't do it. Besides he doesn't understand how two men have sex and is uncomfortable and would rather I do it. But I think it's important for him to be the one. It's a father son thing.