Often times, players want their character to fall in love, either with an NPC or with another PC. This is generally a bad idea, because the game is not really built to support it, and it takes many people out of the comfort zone. If all the players are heavy roleplayers, then it can work, but you need to discuss it ahead of time. Most players do not come to the table with the maturity to describe how they woo a partner. This goes triple for PC to PC interaction. If any player wants to roleplay a romantic or sexual relationship with another PC, you must get the other player’s consent before allowing it in the game. Otherwise it can make players extremely uncomfortable.