It sounds like you have a condition called frenulum breve. The frenulum might tear during sex in your case, but that is not something you really want since it will hurt, will likely cause scarring and once healed it might retighten again if it reattaches itself to where it tore from as part of the healing process. In addition, sex will likely be uncomfortable for a few days after and you also risk getting an infection as well, as an open wound on your penis is not something you really want. If it is just the frenulum that is tight, you could get a surgery called frenuloplasty to remove the tighter bits and lengthen the frenulum. You can also get circumcised, which might be indicated if your foreskin is also tight and it’s not just the frenulum that is causing you discomfort. However, this forum is not meant to be a substitute for medical advice and you are best off seeing your GP to get a referral to an urologist.