hot flashes during anal sex ?

Okay so me and my boyfriend have sex way too often but only just recently did I start getting into anal sex with him. I used to be so against it before but with him everything came so naturally, better said I just felt very comfortable with him so I decide to let him please with anal but oh my while we’re doing anal I suddenly get so hot, like I feel the rush of hotness run through my body. You know like when you doing shots at a bar and it’s starts getting hot ? Yea it’s like that for me! 🤣🤣 please tell me I ain’t the only one!!!!