Reddit3
Link
https://old.reddit.com/r/sex/comments/1q6cdu8/my_gf_wants_us_to_fall_asleep_with_me_inside_her/Comment
It's called dick warming, it's intimate and it's [one of those sexual acts you have to try once in a life time.](https://old.reddit.com/user/Tasty_Leading8684/comments/1q8x72g/download_all_sex_guides_for_men_in_pdf_epub_here/nyrrbo6/) The practical side of it though is that you will lose you erection and won't stay in, just as it's difficult to penetrate her with a week erection.