Hello! thanks for your queries, actually fore skin has many important functions like it protects glans penis and keeps it moist, it can stimulate G-spot in your partner, it contains tactile receptors that are responsible for light sensations and play a key role in achieving rich orgasms. Indications for circumcision are given below: 1.Phimosis (narrowing of the foreskin orifice that prevents retraction of skin and may obstruct urination completely or partially)--- it can be treated manually retracting the fore skin 2.Balanitis/ posthitis (inflammation of the glans or fore skin) 3. other fore skin disease and infections ( psoriasis, lichen sclerosis, lichen planus, schorrheic dermatitis, and Zoon balanitis)\ 4.Zipper injury (foreskin can become accidentally entrapped in zippers, resulting in pain, trauma, swelling and scarring of this appendage) Advises usually fore skin automatically retracts during erection if it dose not retract then you may retract it manually, initially it is very sensitive but your glans (head of penis) will desensitize over the time and you will feel good. However, you may leave the fore skin at the place and have sex, it dose compromise little pleasure in you and your partner. Fore play is vital part of having sex with partner, it should be enough to stimulate both partners before intercourse. Size dose not matter at any stage given you are not having erectile dysfunction. Relax yourself, have good diet and regular exercise and stop thinking about myths and misconceptions as depression and anxiety can compromise your sexual life dangerously so avoid getting useless headaches. Keep smiling! Take Care! Regards