I have had a few F partners who introduced it , they initiated the activity and I certainly enjoyed it. I guess it’s the trust, intimacy and level of relaxation that works. One wonderful woman was exceptionality sensitive and sensual . She loved me to gently worship her neck, décolletage, breasts and nipples , asking to kiss , lick , caress and stroke her and to anoint her nipples with precum . She would often climax with me fingering her at the same time , and always very quickly if I finished her with my mouth .Do real people enjoy doing this, or us this one of those things that just looks good for porn? I've never seen the appeal, personally. Maybe because I have small boobs.