Men, have you ever pressured someone into doing something sexual?

As a follow-up to my other question, I am wondering if any of you men feel like you have had to use pressure, persuasion, or seduction to convince a woman to engage in any kind of sexual act with you (anything from kissing to sexual intercourse).

Do you differentiate between these terms? Are some acceptable, and others not? How much pressure or convincing do you think is acceptable, and where do you draw the line for yourself? Do you think some amount of convincing is necessary to get women to engage in sexual acts? How aware are you of the woman’s desires versus your own? Do you wish women would communicate what they do and don’t want better, or do you feel like you have a pretty good understanding of that?