God its so hot when the bull is just so good you can't help but ignore your boyfriend/ husband and focus on him. Its not your fault its literally biology, you NEED the big dick stud with the good genes. This happened with me and boyfriend when I was in my early 20s before and I basically forgot he was even there the bull was that good, and lets just say he wasn't my boyfriend long after that. It's literally almost impossible to go back to the regular guy.
Its happened to me before- usually my sex buddies find someone with a bigger dick- I can immediately sense the way they touch me becomes different- like the fingers are searching instincitvely for more meat! Also BJs become fewer and fewer- most dont admit it but I can tell!