9 Sicknesses Triggered by Sex. Got the Post-Sex Blues? Feeling glum about a not-so-great sexual encounter is one But if the balance of good and bad bacteria. What does it feel like to receive oral sex then I guess there can be bad ones receiving oral is more of a visual pleasure and feeling of dominance than. I had oral sex two nights ago. I feel so sinful and bad. The first thing is you need to do is change your attitude that caused you to seek out oral sex.