18+!! Question about groinal responses

Does anyone else when they have the thoughts, they feel against it, but they still get arousal or tenglings sensations in the groinal area? Because this is what I experienced today and I feel like crap. This is going to be very triggering for a lot of you, but there are a lot of times that I notice things from kids. For example, there is a thirteen year old kid who looks very developed for her age, and I take notice of (and this already sounds creepy to me) her chest. Today with my thoughts, I imagined as if I were touching it, and although I usually "no no or "I don't want to do that", she is a kid, etc., I still get responses in my groinal area, and It felt very real. Even now, I feel as though I am faking it, even though I groan 😮‍💨 from it, and feel as though I am a fraud. Does anyone relate?

I know that there is that moment of groin and the feeling of "sexual" excitement in all ocd topics related to it... But when the therapist says that it is fake, and that the body reacts like that out of fear, or because it is a sexual topic, I can't accept it! My brain says, you have groin and excitement when you imagine your sister in such scenes, how can I accept that as a normal reaction and let those thoughts and feelings go?

hi does anyone ever get a random grounal response then feel aroused but you don’t want to be like before i had the thought i was feeling a little aroused then i had a random thought and it had the ground response and i felt aroused i don’t understand.