The OP needs more than his dick and blood examined.
You willingly continue with BBFS and climax because you're either "excited or caught off guard." And this has happened 4 times!
Yeah right. The reaction most guys would (and should) have is to stop things the INSTANT bare junior heads toward the goal.
Right - SHE slides you in. You're the one in control of your penis, dick head. What happened happened because you wanted it. If it really worried you so much you'd make sure the jacket was on before you got so "entwined".
Coming inside her and then announcing you won't go back is like finishing a meal and saying you won't go back for more. YOU got what you wanted already.
Your response is harsh - I accept that, but, let me explain as best I can...
Yes it was 4 times, however it was 4 times over the past 7 years - 7 YEARS!
"The reaction of most guys would (and should)"... is an interesting statement - I think most guys would have reacted the same as me (shocked, scared, excited, horny, hard, engorged, adrenalin pumping, your brain spinning, the little head in full control, nothing but animal instinc of hedonistic desire driving the bus) it took me (and probably most guys IMHO) at least 10 seconds for the big head to regain control. The problem is, that 10 seconds is all it took!
Calling me a "Dick Head" is rude. I am sorry I did not handle it the way you would have. We all all human. All I can say is that I got myself checked. I am all good (STD free) and passed nothing on to hurt any of you fine people. I simply had questions and concerns - none of which you helped with.
Thank you for your input.